Therefore, the value of derivatives are-
[tex](a) If x = 10, dy/dt = -20\\(b) If x = 25, dy/dt = -8\\(c) If x = 50, dy/dt = -4[/tex]
To solve this problem, we need to use implicit differentiation. Taking the derivative of both sides with respect to time, we get:
[tex]\frac{d(xy)}{dt} = d(100)/dt[/tex]
Using the product rule and the fact that d(xy)/dt = x(dy/dt) + y(dx/dt), we can rewrite this as:
[tex]x(\frac{dy}{dt} + y\frac{dx}{dt} = 0[/tex]
Substituting in the given value for xy, we get:
[tex]10\frac{dy}{dt} + (100/x)\frac{dx}{dt} = 0[/tex]
Simplifying this equation, we get:
[tex]\frac{dy}{dt} = -(10/x)\frac{dx}{dt}[/tex]
Now we can use this equation to find dy/dt for different values of x:
[tex](a) If x = 10, \frac{dy}{dt} = -(10/10)(20) = -20\\(b) If x = 25, dy/dt = -(10/25)(20) = -8\\(c) If x = 50, dy/dt = -(10/50)(20) = -4[/tex]
Therefore, the answers are:
[tex](a) If x = 10, dy/dt = -20\\(b) If x = 25, dy/dt = -8\\(c) If x = 50, dy/dt = -4[/tex]
learn more about differentiation
https://brainly.com/question/24898810
#SPJ11
How many real solutions are there to the equation x^2 = 1/(x+3)?
For the given equation there are 3 real solutions they are -4/3, -3, 1 , under the condition that the given equation is x² = 1/(x+3)
The equation x²= 1/(x+3) can be restructured as
x³ + 3x² - 1 = 0.
This is a cubic equation and could be evaluated applying the cubic formula. Then, we can also apply the rational root theorem to search the rational roots of the equation.
The rational root theorem projects that if a polynomial equation has integer coefficients, then any rational root of the equation should be of the form p/q
Here,
p = factor of the constant term and q is a factor of the leading coefficient.
For the given case,
the constant term is -1 and the leading coefficient is 1.
Hence, any rational root of the equation should be of the form p/q
Here, p is a factor of -1 and q is a factor of 1.
The possible rational roots are ±1 and ±1/3.
Applying the principle of testing these values, we evaluate that
x = -1/3 is a root of the equation.
Then, we can factorize
x³ + 3x² - 1 as (x + 1/3)(x² + 2x - 3).
The quadratic factor can be simplified further as
(x + 3)(x - 1),
Then, the solutions to the original equation are
x = -4/3, x = -3, and x = 1.
To learn more about cubic equation
https://brainly.com/question/1266417
#SPJ1
Which of the following illustrates the product rule for logarithmic equations?
log₂ (4x)= log₂4+log₂x
O log₂ (4x)= log₂4.log2x
log₂ (4x)= log₂4-log₂x
O log₂ (4x)= log₂4+ log₂x
Answer:
log₂ (4x)= log₂4 + log₂x
Step-by-step explanation:
log₂ (4x)= log₂4 + log₂x illustrates the product rule for logarithmic equations.
The product rule states that logb (mn) = logb m + logb n. In this case, b is 2, m is 4, and n is x. So,
log₂ (4x) = log₂ 4 + log₂ x.
Option A is correct, the product rule for logarithmic equations is log₂ (4x) = log₂ 4 + log₂ x
What is Equation?Two or more expressions with an Equal sign is called as Equation.
The logarithm is the inverse function to exponentiation.
The product rule for logarithmic equations states that the logarithm of a product of two numbers is equal to the sum of the logarithms of the individual numbers.
logab=loga + logb
log₂ (4x) = log₂ 4 + log₂ x
Therefore, the correct illustration of the product rule for logarithmic equations is log₂ (4x) = log₂ 4 + log₂ x
To learn more on Equation:
https://brainly.com/question/10413253
#SPJ5
Find the equation of the tangent plane to the given surface at the indicated point. x2 + y2-z2 + 9 = 0: (6,2,7) Choose the correct equation for the tangent plane. O A. 36(x-6)+ 4(y-2)-49(z-7) 0 ○ B. 12(x-6)+4(y-2)-142-7)=-9 O c. 36(x-6)+4(y-2)-49(z-7)=-9 ○ D. 12(-6) +4(y-2)-142-7)=0 0 E. None of these equations are the correct equation for the tangent plane
Equation of the tangent plane is: 12(x-6) + 4(y-2) - 14(z-7) = 0
Correct answer is option C.
How to find the equation of the tangent plane?We need to first find the partial derivatives of the given surface with respect to x, y, and z.
∂f/∂x = 2x
∂f/∂y = 2y
∂f/∂z = -2z
Then, we can evaluate them at the given point (6, 2, 7):
∂f/∂x = 2(6) = 12
∂f/∂y = 2(2) = 4
∂f/∂z = -2(7) = -14
Equation of the tangent plane is;
12(x-6) + 4(y-2) - 14(z-7) + D = 0
where D is the constant we need to find by plugging in the point (6, 2, 7):
12(6-6) + 4(2-2) - 14(7-7) + D = 0
D = 0
Equation of the tangent plane is:
12(x-6) + 4(y-2) - 14(z-7) = 0
So the correct answer is option C.
Learn more about tangent plane.
brainly.com/question/30260323
#SPJ11
a. what is the probability a randomly selected person will have an iq score of less than 80? (round your answer to 4 decimal places.)
The probability that a randomly selected person will have an IQ score of less than 80 is approximately 0.0918, or 9.18%
To find the probability that a randomly selected person will have an IQ score of less than 80, we need to consider the properties of the normal distribution, as IQ scores typically follow a normal distribution with a mean (μ) of 100 and a standard deviation (σ) of 15.
1. Calculate the z-score: The z-score represents the number of standard deviations a data point is from the mean. Use the formula:
z = (X - μ) / σ
where X is the IQ score, μ is the mean, and σ is the standard deviation.
z = (80 - 100) / 15
z = -20 / 15
z = -1.3333
2. Look up the z-score in a standard normal distribution table or use a calculator to find the corresponding probability. In this case, the probability is 0.0918.
Therefore, the probability that a randomly selected person will have an IQ score of less than 80 is approximately 0.0918, or 9.18% when rounded to four decimal places.
To know more about Probability refer here:
https://brainly.com/question/30034780
#SPJ11
what expression is equivalent to 3(10-25x)?
a. 13 - 22x
b. 30 - 75x
c. 10 - 25x/3
d. 10 - 75x
B) 30 - 75x
This is because of the distributive property.
In the expression 3(10-25x) you have to multiply 3 by the numbers inside.
3 x 10 = 30
3 x 25x = 75x
Then, we keep the subtraction sign. The final answer is 30 - 75x.
Use a table with values x = {−2, −1, 0, 1, 2} to graph the quadratic function y = −2x^
2.
To graph the quadratic function y=-2x^2 using the given values of x, one can create a table with two columns: one for x and the other for y. Starting with x=-2, we can substitute this value into the equation to find the corresponding value of y, which is y=-8. Similarly, by substituting -1, 0, 1, and 2 into the equation, we can find corresponding values of y as 2, 0, -2, and -8, respectively. By plotting these points on a graph and connecting them, we get a downward facing parabola with its vertex at (0,0).
Consider using a z test to test
H0: p = 0.4.
Determine the P-value in each of the following situations. (Round your answers to four decimal places.)
a) Ha : p > 0.4, z= 1.49
The P-value for a one-tailed z-test with Ha: p > 0.4 and z = 1.49 is 0.0675, indicating insufficient evidence to reject the null hypothesis at the 0.05 level of significance.
How to find P-value for any situation?To find the P-value for a z-test with Ha: p > 0.4 and z = 1.49, we first calculate the corresponding area under the standard normal distribution curve.
Using a standard normal table or a calculator, we find that the area to the right of z = 1.49 is 0.0675.
Since the alternative hypothesis is one-tailed, the P-value is equal to the area in the tail to the right of z = 1.49.
Therefore, the P-value for this test is 0.0675 or 6.75% (rounded to four decimal places).
This means that if the null hypothesis is true, there is a 6.75% chance of observing a sample proportion as extreme as or more extreme than the one we obtained.
Since the P-value (6.75%) is greater than the significance level (α), we fail to reject the null hypothesis at the α = 0.05 level of significance. We do not have sufficient
Learn more about P-value
brainly.com/question/30461126
#SPJ11
Consider f(x) = xe *. The Fourier Sine transform of f(x) Fs [f' - = 2z/(z**2+1)**2 The F urier Cosine transform of f(x) Fc[f] z) = (1-z**2)/(1+z**2)**2 Note that while we usually denote the transformed variable by a, the transformed variable in this case is z.
The value of Fc[f(x)] is: (1 - z²)/(1 + z²)²
How to find the value of Fc[f(x)]?The given function is f(x) = xeˣ.
The Fourier Sine Transform of f(x) is given by:
Fs[f(x)] = ∫₀^∞ f(x) sin(zx) dx
Taking the derivative of f(x) with respect to x, we get:
f'(x) = (x + 1) eˣ
Taking the Fourier Sine Transform of f'(x), we get:
Fs[f'(x)] = ∫₀^∞ f'(x) sin(zx) dx
= ∫₀^∞ (x + 1) eˣ sin(zx) dx
Using integration by parts, we get:
Fs[f'(x)] = [(x + 1) (-cos(zx))/z - eˣ sin(zx)/z]₀^∞
+ (1/z) ∫₀^∞ eˣ cos(zx) dx
Simplifying the above expression, we get:
Fs[f'(x)] = 2z/(z² + 1)²
The Fourier Cosine Transform of f(x) is given by:
Fc[f(x)] = ∫₀^∞ f(x) cos(zx) dx
Using integration by parts, we get:
Fc[f(x)] = [xeˣ sin(zx)/z + eˣ cos(zx)/z²]₀^∞
- (1/z²) ∫₀^∞ eˣ sin(zx) dx
Since eˣ sin(zx) is an odd function, the integral on the right-hand side is the Fourier Sine Transform of eˣ sin(zx), which we have already calculated as 2z/(z² + 1)². Substituting this value in the above expression, we get:
Fc[f(x)] = (1 - z²)/(1 + z²)²
Learn more about Fourier Sine Transform
brainly.com/question/30408222
#SPJ11
consider the following geometric series. [infinity] (−3)n − 1 7n n = 1 Find the common ratio. |r| = Determine whether the geometric series is convergent or divergent. convergent divergent If it is convergent, find its sum. (If the quantity diverges, enter DIVERGES.)
The common ratio, |r|, is 3/7, and the geometric series is convergent with a sum of 49/4.
The given geometric series is Σ(−3)ⁿ⁻¹ * 7ⁿ, for n = 1 to infinity. To find the common ratio, |r|, let's simplify the series.
1. Rewrite the series: Σ(−3ⁿ⁻¹ * 7ⁿ, for n = 1 to infinity.
2. Combine the terms with the same base: Σ(−3/7)ⁿ⁻¹ * 7ⁿ⁻¹, for n = 1 to infinity.
3. Now, the common ratio, |r| = |-3/7| = 3/7.
Since |r| < 1, the geometric series is convergent.
To find the sum of the convergent series, use the formula for the sum of an infinite geometric series:
S = a / (1 - r), where 'a' is the first term and 'r' is the common ratio.
4. Find the first term (n=1): a = (−3)¹⁻¹ * 7^1 = 1 * 7 = 7.
5. Use the formula: S = 7 / (1 - (3/7)) = 7 / (4/7) = 7 * (7/4) = 49/4.
To know more about convergent series click on below link:
https://brainly.com/question/15415793#
#SPJ11
Complete question:
consider the following geometric series. [infinity] Σ(−3)ⁿ⁻¹ * 7ⁿ = 1 Find the common ratio. |r| = Determine whether the geometric series is convergent or divergent. convergent divergent If it is convergent, find its sum. (If the quantity diverges, enter DIVERGES.)
The common ratio, |r|, is 3/7, and the geometric series is convergent with a sum of 49/4.
The given geometric series is Σ(−3)ⁿ⁻¹ * 7ⁿ, for n = 1 to infinity. To find the common ratio, |r|, let's simplify the series.
1. Rewrite the series: Σ(−3ⁿ⁻¹ * 7ⁿ, for n = 1 to infinity.
2. Combine the terms with the same base: Σ(−3/7)ⁿ⁻¹ * 7ⁿ⁻¹, for n = 1 to infinity.
3. Now, the common ratio, |r| = |-3/7| = 3/7.
Since |r| < 1, the geometric series is convergent.
To find the sum of the convergent series, use the formula for the sum of an infinite geometric series:
S = a / (1 - r), where 'a' is the first term and 'r' is the common ratio.
4. Find the first term (n=1): a = (−3)¹⁻¹ * 7^1 = 1 * 7 = 7.
5. Use the formula: S = 7 / (1 - (3/7)) = 7 / (4/7) = 7 * (7/4) = 49/4.
To know more about convergent series click on below link:
https://brainly.com/question/15415793#
#SPJ11
Complete question:
consider the following geometric series. [infinity] Σ(−3)ⁿ⁻¹ * 7ⁿ = 1 Find the common ratio. |r| = Determine whether the geometric series is convergent or divergent. convergent divergent If it is convergent, find its sum. (If the quantity diverges, enter DIVERGES.)
Ice cream is packaged in cylindrical gallon tubs. A tub of ice cream has a total surface area of 387.79 square inches.
PLEASE ANSWER QUICK AND FAST
If the diameter of the tub is 10 inches, what is its height? Use π = 3.14.
7.35 inches
7.65 inches
14.7 inches
17.35 inches
*Here is a sample of ACT scores (average of the Math, English, Social Science, and Natural Science scores) for students taking college freshman calculus: 24.00 28.00 27.75 27.00 24.25 23.50 26.25 24.00 25.00 30.00 23.25 26.25 21.50 26.00 28.00 24.50 22.50 28.25 21.25 19.75 a. Using an appropriate graph, see if it is plausible that the observations were selected from a normal distribution. b. Calculate a 95% confidence interval for the population mean. c. The university ACT average for entire freshmen that year was about 21. Are the calculus students better than the average as measured by the ACT? d. A random sample of 20 ACT scores from students taking college freshman calculus. Calculate a 99% confidence interval for the standard deviation of the population distribution. Is the interval valid whatever the nature of the distribution? Explain.
From the histogram, we can say that the observations were selected from a normal distribution. We are 95% confident that the population mean ACT score for students taking freshman calculus is between 24.208 and 26.582. The calculus students have a higher average score of 25.395. we are 99% confident that the population standard deviation is between 8.246 and 23.639.
To check whether the observations were selected from a normal distribution, we can create a histogram or a normal probability plot.
From the histogram, it seems plausible that the observations were selected from a normal distribution, as the data appears to be roughly symmetric.
Using the given data, we can calculate a 95% confidence interval for the population mean using the formula
confidence interval = sample mean ± (critical value)(standard error)
The critical value for a 95% confidence interval with 19 degrees of freedom (n - 1) is 2.093.
The sample mean is 25.395, and the standard error can be calculated as the sample standard deviation divided by the square root of the sample size
standard error = 2.630 / sqrt(20) = 0.588
Therefore, the 95% confidence interval is
25.395 ± (2.093)(0.588)
= [24.208, 26.582]
We are 95% confident that students taking freshman calculus is between 24.208 and 26.582.
The university ACT average for entire freshmen that year was about 21. The calculus students have a higher average score of 25.395. Therefore, we can say that the calculus students performed better on the ACT than the average freshman.
To calculate a 99% confidence interval for the population standard deviation, we can use the chi-square distribution. The formula for the confidence interval is
confidence interval = [(n - 1)s^2 / χ^2_(α/2), (n - 1)s^2 / χ^2_(1-α/2)]
where n is the sample size, s is the sample standard deviation, and χ^2_(α/2) and χ^2_(1-α/2) are the chi-square values with α/2 and 1-α/2 degrees of freedom, respectively.
For a 99% confidence interval with 19 degrees of freedom, the chi-square values are 8.906 and 32.852.
Plugging in the values from the sample, we get
confidence interval = [(19)(6.615^2) / 32.852, (19)(6.615^2) / 8.906]
= [8.246, 23.639]
Therefore, we are 99% confident that the population standard deviation is between 8.246 and 23.639. This interval assumes that the population is normally distributed. If the population is not normally distributed, the interval may not be valid.
To know more about confidence interval:
https://brainly.com/question/29680703
#SPJ4
If f(2)=25 and f' (2) = -2.5, then f(2.5) is approximately: A. 2 B. 2.5 C. - 2.5 D. 1.25 E. -2
If the function f(2)=25 and f' (2) = -2.5, then f(2.5) is approximately 23.75
The first-order Taylor's approximation formula, also known as the linear approximation formula, is a mathematical formula that provides an approximate value of a differentiable function f(x) near a point a. The formula is given as
f(x) ≈ f(a) + f'(a)(x - a)
where f'(a) is the derivative of f(x) at the point a. This formula is based on the tangent line to the graph of f(x) at the point (a, f(a)). The approximation becomes more accurate as x gets closer to a.
We can use the first-order Taylor's approximation formula to estimate the value of f(2.5) based on the information given
f(x) ≈ f(a) + f'(a)(x - a)
where a = 2 and x = 2.5. Plugging in the values, we get
f(2.5) ≈ f(2) + f'(2)(2.5 - 2)
f(2.5) ≈ 25 + (-2.5)(0.5)
f(2.5) ≈ 23.75
Learn more about first-order Taylor's approximation formula here
brainly.com/question/14787721
#SPJ4
Determine whether the statement is true or false. If it is true, explain why. If it is false, explain why or give an example that disproves the statement.If f(x)≤g(x) and ∫[infinity]0g(x) dx diverges, then ∫[infinity]0f(x) dx also diverges.
The statement "If f(x)≤g(x) and [tex]\int\limits^{infinity}_0 {g(x)} \, dx[/tex] diverges, then [tex]\int\limits^{infinity}_0 {g(x)} \, dx[/tex]
also diverges" is true.
If f(x)≤g(x) for all x and [tex]\int\limits^{infinity}_0 {g(x)} \, dx[/tex] diverges, then we can conclude that
[tex]\int\limits^{infinity}_0 {g(x)} \, dx[/tex] also diverges.
To see why, consider the integral [tex]\int\limits^{infinity}_0 {g(x)} \, dx[/tex]. Since f(x) ≤ g(x) for all x,
we have:
[tex]\int\limits^{infinity}_0 {f(x)} \, dx[/tex] ≤ [tex]\int\limits^{infinity}_0 {g(x)} \, dx[/tex]
If [tex]\int\limits^{infinity}_0 {g(x)} \, dx[/tex] diverges, then the integral on the right-hand side is
infinite. Since [tex]\int\limits^{infinity}_0 {f(x)} \, dx[/tex] is less than or equal to an infinite integral, it
must also be infinite. Therefore, [tex]\int\limits^{infinity}_0 {f(x)} \, dx[/tex] also diverges.
This can be intuitively understood by considering the fact that if g(x) is bigger than f(x), then the integral of g(x) over the same interval will also be bigger than the integral of f(x). Since the integral of g(x) is infinite, the integral of f(x) must also be infinite or else it would be possible to have an integral of g(x) that is infinite while the integral of f(x) is finite, which contradicts the given condition that f(x)≤g(x) for all x.
Therefore, the statement is true.
Learn more about integral at: https://brainly.com/question/30094386
#SPJ11
Please Help! ∆ ABC is an isosceles right triangle. 1. A = ___ . 2. B = ____ . 3. If AC = 3, then BC = __ and AB =__. 4. If AC = 4, then BC = __ and AB = ___. 5. If BC = 9, then AB = ____. 6. If AB = 7V2, then BC =___ .
7. If AB = 2√2, then AC = _____.
The missing sides and angles of the triangle are
1. . A = 45 degrees.
2. B = 45 degrees.
3. BC = 3 and AB = 3 sqrt (2).
4. BC = 4 and AB = 4 sqrt (2).
5. BC = 9, then AB = 9 sqrt (2).
6. AB = 7V2, then BC = 7 .
7. If AB = 2√2, then AC = 2.
What is isosceles right triangle?An Isosceles Right Triangle is an angular design in the shape of a right triangle comprising two equal sides - forming congruent legs, and additionally, the third side (also known as the hypotenuse = c) being longer in length.
In this particular angle, the two legs are congruent to each other as well as proportional to the square root of two times one leg's length.
Mathematically, using Pythagoras' theorem
c^2 = a^2 + a^2
c^2 = 2a^2
Eventually, by taking the square root of both expressions, we obtain:
c = sqrt (2a^2)
c = a * sqrt (2)
Learn more about isosceles right triangle at
https://brainly.com/question/29793403
#SPJ1
I NEED HELP ON THIS ASAP!!!!
When dealing with exponential functions given by y = (a + c)^x, where the constant 'c' is used to achieve horizontal shifts, there are particular effects on the domain, range, and asymptotes
Effects of constant on domain, range, and asymptotesThe function's output values, or range, persist unchanged since it can assume any positive value for input from the vertical axis. Similarly, factorizing by adding constants does not impact the function's input values, otherwise known as the domain.
While horizontally shifting the exponentially-decreasing function, its horizontal asymptote remains unaffected; however, the positional shift depends on the magnitude and direction of said diasporic events. Equivalently, rightward shifts append positively and leftward motions take away from the aforementioned translation distance.
Learn more about exponential functions at
https://brainly.com/question/2456547
#SPJ1
help finding coordinates
The coordinates of N by the 270 degree rotation clockwise rule is (-7, 3)
Finding the coordinates of NFrom the question, we have the following parameters that can be used in our computation:
N = (-3, 7)
The transfomation rule is given as
270 degree rotation rule clockwise
Mathematically, this is represented as
(x, y) = (-y, x)
Substitute the known values in the above equation, so, we have the following representation
N' = (-7, 3)
Hence, the coordinates of N after the rotation is (-7, 3)
Read more about transformation at
https://brainly.com/question/27224272
#SPJ1
Find the Taylor Series for f centered at 4 if
f (n)(4) =((-1)nn!)/(3n(n+1))
What is the radius of convergence of the Taylor series?
We have computed the Taylor polynomials of the given function f (x) = cos (4x), using around 6 decimals for approximation. These polynomials can then be used to approximate the given function.
What is function?Function is a block of code that performs a specific task. It can accept input parameters and return a value or a set of values. Functions are used to break down a complex problem into simple, manageable tasks. They also help improve code readability and re-usability. By using functions, you can write code more efficiently and easily maintain your program.
The Taylor series of a given function is a polynomial approximation of that function, derived using derivatives. In this case, we are asked to compute the Taylor polynomial for the function f (x) = cos (4x).
The Taylor polynomials of f are as follows:
p0(x) = 1
p1(x) = 1 - 8x2
p2(x) = 1 - 8x2 + 32x4
p3(x) = 1 - 8x2 + 32x4 - 128x6
p4(x) = 1 - 8x2 + 32x4 - 128x6 + 512x8
For any approximations, we can use around 6 decimals. For instance, if x = 0.5, then p4(0.5) = 0.988377, which is an approximation of the actual value of f (0.5), which is 0.98879958.
In conclusion, we have computed the Taylor polynomials of the given function f (x) = cos (4x), using around 6 decimals for approximation. These polynomials can then be used to approximate the given function.
To know more about function click-
http://brainly.com/question/25841119
#SPJ1
1. assuming interest rates are 5 pr, what is the value at t0 of each of the following 4 year annuities:
The value at t0 of a 4-year annuity depends on the payment amount and the interest rate. Assuming the interest rate is 5%, the value of each of the following 4-year annuities can be calculated using the present value of an annuity formula.
An annuity that pays $10,000 at the end of each year for 4 years:In summary, at t0, the value of each 4-year annuity is approximately $36,376 for an annuity that pays $10,000 at the end of each year, $36,252 for an annuity that pays $5,000 at the end of each half-year, $36,172 for an annuity that pays $1,000 at the end of each quarter, and $36,130 for an annuity that pays $500 at the end of each month, assuming a 5% interest rate. For each annuity, the present value of an annuity formula was used to compute the value at t0, and the interest rate was changed based on the frequency of payments.
To learn more about annuities, visit:
https://brainly.com/question/27883745
#SPJ11
please help! finding the matrix
Answer:
Step-by-step explanation:
A = [tex]\left[\begin{array}{cc}4&-4\\3&-2\end{array}\right][/tex]
3B = [tex]\left[\begin{array}{cc}12&12\\0&3\end{array}\right][/tex]
4 + 12 = 16 ; 12 + ( - 4) = 8
3 + 0 = 3 ; - 2 + 3 = 1
A + 3B = [tex]\left[\begin{array}{cc}16&8\\3&1\end{array}\right][/tex]
[tex](A+3B)^{-1}[/tex] = [tex]\left[\begin{array}{cc}-\frac{1}{8} &1\\\frac{3}{8} &-2\end{array}\right][/tex]
X = C ÷ ( A + 3B ) = C × [tex](A+3B)^{-1}[/tex]
X = [tex]\left[\begin{array}{cc}-1&0\\5&2\end{array}\right][/tex] × [tex]\left[\begin{array}{cc}-\frac{1}{8} &1\\\frac{3}{8} &-2\end{array}\right][/tex] = [tex]\left[\begin{array}{cc}\frac{1}{8} &-1\\\frac{1}{8} &1\end{array}\right][/tex]
Is (-10,10) a solution for the inequality y≤x+7
Answer: no
Step-by-step explanation: if we'd substitute the numbers, it'd look like this 10≤-10+7 which isn't true as "≤" this symbol means more than or equals to but -10 plus 7 is equal to 3 so it doesn't fit the inequality
Two joggers run 6 miles south and then 5 miles east. What is the shortestdistance they must travel to return to their starting point?
Answer:
7.81 miles
Step-by-step explanation:
pythagorean theorem, 6 units downwards, and 5 east, so we have to calculate the hypotenuse, or sqrt( 6^2 + 5^2) which is sqrt61 or 7.81 miles
identify the line of discontinuity:f(x,y)=ln|x y|
The line of discontinuity is x = 0 or y = 0.
We have,
To identify the line of discontinuity in the function f(x, y) = ln|x y|, we need to determine the values of x and y for which the function becomes undefined or exhibits a discontinuity.
In this case, the natural logarithm function, ln, is undefined for non-positive values.
Therefore, we need to find the values of x and y that make the expression |x y| non-positive.
The absolute value of a real number is non-positive when the number itself is zero or negative.
So, we set the expression inside the absolute value, x y, to be zero or negative:
x y ≤ 0
This inequality indicates that either x ≤ 0 and y ≥ 0, or x ≥ 0 and y ≤ 0, for the expression to be non-positive.
Hence, the line of discontinuity occurs along the line where either x ≤ 0 and y ≥ 0, or x ≥ 0 and y ≤ 0.
The equation of this line can be written as:
x ≤ 0, y ≥ 0 or x ≥ 0, y ≤ 0
This line divides the plane into two regions:
one where x ≤ 0 and y ≥ 0, and the other where x ≥ 0 and y ≤ 0.
Along this line, the function f(x, y) = ln|x y| becomes undefined or discontinuous.
Note that when x = 0 or y = 0, the function f(x, y) = ln|x y| is also undefined, but these points do not form a continuous line.
Thus,
The line of discontinuity is x = 0 or y = 0.
Learn more about functions here:
https://brainly.com/question/28533782
#SPJ12
Estimate the least number of terms needed in a Taylor polynomial to guarantee the value of In(1.08)has accuracy of 10-10, 10 b 5 d. 11
The least number of terms needed in a Taylor polynomial to guarantee the value of ln(1.08) has an accuracy of 10⁻¹⁰ is 30. Option a is correct.
The Taylor series expansion of ln(1+x) is given by:
ln(1+x) = x - x²/2 + x³/3 - x⁴/4 + ...For ln(1.08), we have x = 0.08. Therefore, the nth term of the series is given by:
(-1)ⁿ⁺¹ * (0.08)ⁿ / nTo guarantee the accuracy of ln(1.08) to 10⁻¹⁰, we need to ensure that the absolute value of the remainder term (i.e., the difference between the actual value and the value obtained using the Taylor polynomial approximation) is less than 10⁻¹⁰.
The remainder term can be bounded by the absolute value of the (n+1)th term of the series, which is:
(0.08)ⁿ⁺¹ / (n+1)Therefore, we need to find the smallest value of n such that:
(0.08)ⁿ⁺¹ / (n+1) < 10⁻¹⁰Solving this inequality numerically, we get n > 29.82. Therefore, we need at least 30 terms in the Taylor polynomial to guarantee the accuracy of ln(1.08) to 10⁻¹⁰. Hence Option a is correct.
To learn more about Taylor polynomial, here
https://brainly.com/question/31419648
#SPJ4
The complete question is:
Estimate the least number of terms needed in a Taylor polynomial to guarantee the value of In(1.08)has accuracy of 10⁻¹⁰.
a. 30b. 5c. 20d. 11Determine whether the sequence converges or diverges. If it converges, find the limit. (If an answer does not exist, enter DNE.) an = ln(3n2 + 4) − ln(n2 + 4) lim n→[infinity] an = ?
The sequence converges to: lim n→[infinity] an = ln(3) = 1.0986. So the sequence converges to 1.0986.
To determine whether the sequence converges or diverges and find the limit, we'll use the properties of logarithms and the concept of limits at infinity.
Given sequence: a_n = ln(3n² + 4) - ln(n² + 4)
Using the logarithm property, ln(a) - ln(b) = ln(a/b), we can rewrite the sequence as:
a_n = ln[(3n² + 4)/(n² + 4)]
Now, we'll find the limit as n approaches infinity:
lim (n→∞) a_n = lim (n→∞) ln[(3n² + 4)/(n² + 4)]
To evaluate this limit, we can divide both the numerator and the denominator by the highest power of n, which is n^2 in this case:
lim (n→∞) ln[(3 + 4/n²)/(1 + 4/n²)]
As n approaches infinity, the terms with n² in the denominator will approach 0:
lim (n→∞) ln[(3 + 0)/(1 + 0)] = ln(3)
So, the sequence converges, and the limit is ln(3).
Learn more about convergence here: brainly.com/question/15415793
#SPJ11
Solve the triangle. Round lengths to the nearest tenth and angle measures to the nearest degree. A = 11.2°, C = 131.6°, a = 84.9 a. B = 37.29, b=326.9.c = 264.3b. B - 37.2º, b = 27.3.c = 222 c. B = 37.2°, b = 264.3, c = 326.9 d. B-36.8°, b = 261.8, c= 326.9
The correct answer is option c. i.e. B = 37.2°, b = 264.3, c = 326.9.
To solve the triangle, we can use the given information:
1. A = 11.2°
2. C = 131.6°
3. a = 84.9
Step 1: Find angle B.
Since the sum of angles in a triangle is 180°, we can calculate angle B as follows:
B = 180° - (A + C) = 180° - (11.2° + 131.6°) = 180° - 142.8° = 37.2°
Step 2: Find side b.
We can use the Law of Sines to find side b.
a / sin(A) = b / sin(B)
84.9 / sin(11.2°) = b / sin(37.2°)
Now, solve for b:
b = (84.9 * sin(37.2°)) / sin(11.2°) ≈ 264.3
Step 3: Find side c.
Again, we can use the Law of Sines to find side c.
a / sin(A) = c / sin(C)
84.9 / sin(11.2°) = c / sin(131.6°)
Now, solve for c:
c = (84.9 * sin(131.6°)) / sin(11.2°) ≈ 326.9
So, the final answer is:
B = 37.2°, b = 264.3, c = 326.9, which corresponds to option c.
Know more about "law of sine" click here:
https://brainly.com/question/17289163
#SPJ11
1. The One Way Repeated Measures ANOVA is used when you have a quantitative DV and an IV with three or more levels that is within subjects in nature.
A. True
B. False
ANOVA is used when you have quantitative DV and IV with 3 or more levels, which means the correct answer is option A. True.
The One Way Repeated Measures ANOVA is a statistical test used to analyze the effects of an independent variable (IV) that has three or more levels on a dependent variable (DV) that is measured repeatedly on the same subjects over time. This test is appropriate when the IV is within-subjects in nature, meaning that each participant is exposed to all levels of the IV. Therefore, the statement is true as it accurately describes the use of this statistical test in relation to the IV and DV.
A. True
The One-Way Repeated Measures ANOVA is indeed used when you have a quantitative Dependent Variable (DV) and an Independent Variable (IV) with three or more levels that is within subjects in nature. In this case, the same subjects are exposed to different conditions or levels of the IV, allowing for the analysis of differences in the DV across those conditions.
Learn more about ANOVA here:
https://brainly.com/question/23638404
#SPJ11
Many situations in business require the use of an "average" function. One example might be the determination of a function that models the average cost of producing an item. In this activity, you will build and use an "average" function. When the iPhone was brand new, one could buy a 8-gigabyte model for roughly $600. There was an additional $70-per month service fee to actually use the iPhone as intended. We will assume for this activity that the monthly service fee does not change. A. Determine the total cost of owning an iPhone after: i. 2 months ii. 4 months iii. 6 months iv. 8 months
The average cost per month of owning an iPhone decreases as the number of months of ownership increases. After 8 months, the average cost per month is $145.
Assuming a constant monthly service fee of $70, the total cost (C) of owning an iPhone for n months can be calculated as:
C = 600 + 70n
where n is the number of months of ownership.
Using this formula, we can calculate the total cost of owning an iPhone after:
i. 2 months:
C = 600 + 70(2) = 740
ii. 4 months:
C = 600 + 70(4) = 880
iii. 6 months:
C = 600 + 70(6) = 1020
iv. 8 months:
C = 600 + 70(8) = 1160
To find the average cost per month, we can divide the total cost by the number of months:
i. Average cost per month after 2 months: 740 / 2 = 370
ii. Average cost per month after 4 months: 880 / 4 = 220
iii. Average cost per month after 6 months: 1020 / 6 = 170
iv. Average cost per month after 8 months: 1160 / 8 = 145
Therefore, the average cost per month of owning an iPhone decreases as the number of months of ownership increases. After 8 months, the average cost per month is $145.
Learn more about “ average cost “ visit here;
https://brainly.com/question/31116213
#SPJ4
A $52 item Ms marked up 10% and then marked down 10%. What is the final price?
Help pls
the final price will stay as $52
State the trigonometric substitution you would use to find the indefinite integral. Do not integrate. x^2(x^2 - 64)^3/2 dxx(θ)=
The trigonometric substitution to find the indefinite integral is x = 8sec(θ).
Explanation:
To find the trigonometric substitution for the given integral, follow these steps:
Step 1: we first notice that the expression inside the square root can be written as a difference of squares:
x^2 - 64 = (x^2 - 8^2)
Step 2: substitute x = 8sec(θ), which leads to the following substitutions:
x^2 = 64sec^2(θ)
x^2 - 64 = 64 tan^2(θ)
And
dx = 8sec(θ)tan(θ) dθ
Step 3: With these substitutions, the given integral can be rewritten as:
∫ x^2(x^2 - 64)^3/2 dx = ∫ (64sec^2(θ))(64tan^2(θ))^3/2 (8sec(θ)tan(θ)) dθ
Step 4: Simplifying this expression, we get:
∫ 2^18sec^3(θ)tan^4(θ) dθ
Therefore, the trigonometric substitution to find the indefinite integral is x = 8sec(θ).
Know more about the indefinite integral click here:
https://brainly.com/question/31326046
#SPJ11
describe in words when it would be advantageous to use polar coordinates to compute a double integral.
When each point on a plane of a two-dimensional coordinate system is decided by a distance from a reference point and an angle is taken from a reference direction, it is known as the polar coordinate system.
Polar coordinates are advantageous when the region being integrated over has a circular or symmetric shape. This is because polar coordinates use angles and radii to describe points in a two-dimensional plane, which aligns well with circular and symmetric shapes. Additionally, polar coordinates can simplify the integrand, as some functions are more easily expressed in terms of angles and radii rather than Cartesian coordinates.
learn more about "Polar coordinate":-https://brainly.com/question/29012031
#SPJ11