the daily dinner bills in a local restaurant are normally distributed with a mean of $30 and a standard deviation of $5. what is the probability that a randomly selected bill will be at least $39.10 ?
a. 0.9678
b. 0.0322
c. 0.9656
d. 0.0344

Answer:

True

Step-by-step explanation:

The given statement can be translated into the following algebraic equation:

7x+2=12

Where x is the unknown number.

With the help of the given graph, we know that Juan has read 10 books by day 12.

A graph is a visual representation or diagram that displays facts or values in an organized manner in mathematics.

The points on a graph are typically used to depict the relationships between two or more things.

Making a diagram that shows the link between two or more objects is known as developing a graph.

Create a graph by placing a series of bars on graph paper.

So, for path:
The curve line: y = kx + 5 which passes (4, 10)

10 = 4k + 5, k = 5/4

For Juan:

His reading rate same as Patti's.

Curve line: y = ax + b

a = 5/4

He has not read any book before 4th day.

So, when x = 4, y = 0.

0 = 4a + 5, 4 * 5/4 + b

b = -5

y = 5/4 * -5 (x > 4)

When x = 12, y = 5/4 * 12 - 5 = 15 - 5 = 10

Juan has read 10 books by day 12.

Therefore, with the help of the given graph, we know that Juan has read 10 books by day 12.

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With the help of the given graph, we know that Juan has read 10 books by day 12.

A graph is a visual representation or diagram that displays facts or values in an organized manner in mathematics.

The points on a graph are typically used to depict the relationships between two or more things.

Making a diagram that shows the link between two or more objects is known as developing a graph.

Create a graph by placing a series of bars on graph paper.

So, for path:
The curve line: y = kx + 5 which passes (4, 10)

10 = 4k + 5, k = 5/4

For Juan:

His reading rate same as Patti's.

Curve line: y = ax + b

a = 5/4

He has not read any book before 4th day.

So, when x = 4, y = 0.

0 = 4a + 5, 4 * 5/4 + b

b = -5

y = 5/4 * -5 (x > 4)

When x = 12, y = 5/4 * 12 - 5 = 15 - 5 = 10

Juan has read 10 books by day 12.

Therefore, with the help of the given graph, we know that Juan has read 10 books by day 12.

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To prove that n^3 + 3n^4 is θ (2n^3), we need to show that there exist positive constants c1, c2, and n0 such that

c1 * 2n^3 ≤ n^3 + 3n^4 ≤ c2 * 2n^3 for all n ≥ n0.

First, we will show that n^3 + 3n^4 ≤ c2 * 2n^3 for all n ≥ 1, where c2 = 4. For n ≥ 1, we have

n^3 + 3n^4 ≤ 4n^4 = 2(2n^3) ≤ 2n^3 * c2

Therefore, n^3 + 3n^4 is O(n^3), and hence it is also O(2n^3).

Next, we will show that n^3 + 3n^4 ≥ c1 * 2n^3 for all n ≥ 1, where c1 = 1/4. For n ≥ 1, we have

n^3 + 3n^4 ≥ (1/4) * 3n^4 = (3/4) * 4n^4/4 = (3/4) * 2n^3

Therefore, n^3 + 3n^4 is Ω(n^3), and hence it is also Ω(2n^3).

Since n^3 + 3n^4 is both O(2n^3) and Ω(2n^3), we conclude that n^3 + 3n^4 is θ(2n^3).

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The probability of laboratory errors in a re-accreditation period follows a Poisson distribution, and we can use this information to answer various questions about the number of laboratories committing errors.

A. The probability that exactly 10 laboratories commit errors in a re-accreditation period, assuming errors follow a Poisson distribution with an average of 30 laboratories committing errors, is 0.00003 (or 3 x 10^-5).

B. To find the standard deviation, we use the formula: square root of the average number of errors (lambda), which is 30. Therefore, the standard deviation is approximately 5.5772.

C. To calculate the probability that more than 40 but less than or equal to 51 laboratories commit errors in a re-accreditation period, we need to use the Poisson distribution formula with lambda equal to 30 and subtract the probability that 40 or fewer laboratories commit errors from the probability that 51 or fewer laboratories commit errors. The result is approximately 0.0108.

D. If the probability of lab errors is 58%, we can use the Poisson distribution formula with lambda equal to the average number of errors, which is 30, to calculate the probability of up to how many laboratories committed errors. The answer is approximately 4 (or 5, if rounded up).

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We need at least n = 127 terms to ensure the remainder is less than 0.0005 for infinite series.

We can use the formula for the remainder of a convergent geometric series:

R = a(1 - [tex]r^n[/tex])/(1 - r)

where R is the remainder, a is the first term, r is the common ratio, and n is the number of terms.

In this case, a = 2/5, r = (1/5)² = 1/25, and we want R < 0.0005. Substituting these values and solving for n, we get:

0.0005 > (2/5)(1 - [tex](1/25)^n[/tex])/(1 - 1/25)

0.0005(24/25) > 1 - [tex](1/25)^n[/tex]

[tex](1/25)^n[/tex] > 0.9992

n log(1/25) > log(0.9992)

n < log(0.9992)/log(1/25)

n > 126.06

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The  f(x) = -3x + 4. 1 is a bijection as it is both one to one and onto.

We need to carry out two steps to check for the bijection-
1) To determine if f is one-to-one, we need to check if different inputs yield different outputs.

So, let's suppose f(a) = f(b) for some real numbers a and b.

Then, -3a + 4 = -3b + 4, which simplifies to -3a = -3b.

Dividing by -3 (which is allowed since -3 is not zero), we get a = b.

Therefore, f is one-to-one.

2) To determine if f is onto (also known as surjective), we need to check if every output has at least one corresponding input.

Let's suppose y is a real number.

Then, we need to solve the equation f(x) = y for x.

That is, -3x + 4 = y,  which gives us x = (4 - y)/3.

Therefore, every real number y has a preimage under f, and f is onto (surjective).

3) Since f is both one-to-one and onto, it is a bijection.
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The  f(x) = -3x + 4. 1 is a bijection as it is both one to one and onto.

We need to carry out two steps to check for the bijection-
1) To determine if f is one-to-one, we need to check if different inputs yield different outputs.

So, let's suppose f(a) = f(b) for some real numbers a and b.

Then, -3a + 4 = -3b + 4, which simplifies to -3a = -3b.

Dividing by -3 (which is allowed since -3 is not zero), we get a = b.

Therefore, f is one-to-one.

2) To determine if f is onto (also known as surjective), we need to check if every output has at least one corresponding input.

Let's suppose y is a real number.

Then, we need to solve the equation f(x) = y for x.

That is, -3x + 4 = y,  which gives us x = (4 - y)/3.

Therefore, every real number y has a preimage under f, and f is onto (surjective).

3) Since f is both one-to-one and onto, it is a bijection.
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The required answer is the series is divergent  we cannot find its sum.

The given series is an alternating series with decreasing absolute values of its terms. Thus, we can use the Alternating Series Test to determine its convergence. According to this test, if the absolute values of the terms in an alternating series are decreasing and approach zero, then the series is convergent.

In this case, the absolute values of the terms are:

|4|, |-16/3|, |64/9|, |-256/27|, ...

which are decreasing and approach zero. Therefore, we can conclude that the series is convergent.
the property that different transformations of the same state have a transformation to the same end state. Convergent series, the process of some functions and sequences approaching a limit under certain conditions.
To find its sum, we can use the formula for the sum of an alternating series:

sum = a - a/2 + a/3 - a/4 + a/5 - ...

where a is the first term in the series. In this case, a = 4. Therefore, we have:

sum = 4 - 4/2 + 4/3 - 4/4 + 4/5 - ...

Simplifying this expression, we get:

sum = 4(1 - 1/2 + 1/3 - 1/4 + 1/5 - ...)
This is an alternating series, and to test its convergence, we can apply the Alternating Series Test.
which is a well-known series called the harmonic series. It is known to be divergent, which means that the sum of our alternating series is also divergent. Therefore, we cannot find its sum.

To determine whether the series 4 - (16/3) + (64/9) - (256/27) + ... is convergent or divergent, and if convergent, find its sum, we'll first identify the pattern and express it as a general series formula.
the property that different transformations of the same state have a transformation to the same end state. Convergent series, the process of some functions and sequences approaching a limit under certain conditions.

Notice that the terms are alternating in sign and the numerators are powers of 4, while the denominators are powers of 3. We can express the series as:

∑((-1)^(n+1) * (4^n) / (3^n)) for n = 1 to infinity.

This is an alternating series, and to test its convergence, we can apply the Alternating Series Test. The test has two conditions:

1. The absolute value of the terms must be decreasing: |a_(n+1)| <= |a_n|.
2. The limit of the absolute value of the terms must be 0: lim(n->infinity) |a_n| = 0.

For condition 1:
|a_(n+1)| = |(4^(n+1))/(3^(n+1))|
|a_n| = |(4^n)/(3^n)|

Since 4/3 > 1, the terms in absolute value will be decreasing.

For condition 2:
lim(n->infinity) |(4^n)/(3^n)| = lim(n->infinity) |(4/3)^n|

As n approaches infinity, (4/3)^n also approaches infinity, so the limit is not 0.

Since the second condition is not met, the Alternating Series Test fails, and the series is divergent. Therefore, we cannot find its sum.

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The possible value of QRP is 24^o.

A sine rule is a trigonometric rule which can be used to determine either the angle or length of side of a given triangle that is not a right angle.

sine rule states that;

a/Sin A = b/Sin B = c/Sin C

From the given question, let the measure of angle QRP be represented by R. So that;

9/ Sin 37 = 6/ Sin R

9 Sin R = 6 Sin 37

Sin R = 6 Sin 37/ 9

  = 3.611/ 9

  = 0.4012

R = Sin^-1 (0.4012)

  = 23.65

Thus, QRP is 24^o.

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Answer:

Hence, the answer is option C. 0.7.

Step-by-step explanation:

To find P(A or B), we need to find the probability of the event that at least one of the 10 students plays basketball or soccer or both.

We can see from the Venn diagram that there are 3 students who play only basketball (Jada, Gabby, and Fran), 1 student who plays only soccer (Mickey), and 3 students who play both basketball and soccer (lan, Juan, and Ella).

Therefore, the total number of students who play basketball or soccer or both is 3 + 1 + 3 = 7.

So, P(A or B) = probability of the event that at least one of the 10 students plays basketball or soccer or both = 7/10 = 0.7.

Hence, the answer is option C. 0.7.

The value of P(A/B)=1/3 from the venn diagram.

It is a branch of mathematics that deals with the occurrence of a random event.

Let A represents a set of students playing Basketball and B represents a set of students playing Soccer

So, A = {Fran, Ian, Juan, Ella}

⇒ n(A) = 4

B = {Mickey, Marcus, Ella}

⇒ n(B) = 3

(A ∩ B) = {Ella}

⇒ n(A ∩ B) = 1

sample space: S = {Fran, Ian, Juan, Ella, Mickey, Marcus, Mai, Karl, Jada, Gabby}

⇒ n(S) = 10

Now, we calculate probability of B and A∩B.

P(B) = n(B)/n(S)

⇒ P(B) = 3/10

Also, P(A∩B) = n(A∩B) / n(S)

⇒ P(A∩B) = 1/10

So, the required probability would be,

⇒ P(A|B) = P(A∩B) ÷ P(B)

⇒ P(A|B) = (1/10) ÷ (3/10)

⇒ P(A|B) = 1/3

Therefore, the value of P(A|B) = 1/3

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The P-value is approximately 0.003. The 95% upper confidence interval on the true process fraction nonconforming is (0.116, 1).

CI are typically estimated at a confidence level of 95% in accordance with the conventional acceptance of statistical significance at a P-value of 0.05 or 5%. In general, the null hypothesis shouldn't fall inside the 95% CI if an observed result is statistically significant at a P-value of 0.05.

We can use the following calculation to create a 95% upper confidence interval on the actual process percent nonconforming:

p+ z√(p(1-p)/n) ≤ p ≤ 1

Plugging in the values, we get:

0.13 + 1.96*√(0.13(1-0.13)/500) ≤ p ≤ 1

Simplifying, we get:

0.116 ≤ p ≤ 1

Therefore, the 95% upper confidence interval on the true process fraction nonconforming is (0.116, 1).

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The company's mean annual growth rate over the past six years is 12.9%

To calculate the mean annual growth rate of the company over the past six years, we can use the following formula:

mean annual growth rate = (current value / past value) ^ (1/number of years) - 1

Substituting the given values, we get:

mean annual growth rate = (10 - 4) ^ (1/6) - 1
mean annual growth rate = 0.129 or 12.9% (rounded to one decimal place)

Therefore, the company's mean annual growth rate over the past six years is 12.9%.

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The population of locusts gains 3/4 of it's size every 0.5 weeks.

An exponential function has the definition presented as follows:

y = ab^x.

In which the parameters are given as follows:

The growth rate after t weeks is given as follows:

(49/16)

When the population gains 3/4 of it's size, the fraction change is given as follows:

1 + 3/4 = 4/4 + 3/4 = 7/4.

Thus the number of weeks needed for the function to gain 3/4 of it's size is obtained as follows:

(49/16)^t = 7/4

(7/4)^(2t) = 7/4

2t = 1

t = 0.5.

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To begin with, let's first understand what a series is. In mathematics, a series is a sum of numbers that follow a certain pattern. In this case, we have been given a series that follows the pattern of 4(4k + 3), where k is the variable that takes on different values.

Now, to find the sum of the series when k = 1, we need to plug in this value of k into the expression 4(4k + 3) and evaluate the result. So, when k = 1, we have:

4(4(1) + 3) = 4(4 + 3) = 4(7) = 28

This gives us the result of the expression when k = 1, which is 28. Therefore, the sum of the series 4(4k + 3) when k = 1 is 28.

But how do we know that this is the correct answer? To verify this, we can calculate the sum of the series manually by adding up the terms of the series for different values of k.

The given series is 4(4k + 3), so the first few terms of the series for k = 1, 2, 3, and 4 are:

k = 1: 4(4(1) + 3) = 28

k = 2: 4(4(2) + 3) = 44

k = 3: 4(4(3) + 3) = 60

k = 4: 4(4(4) + 3) = 76

If we add up these terms, we get:

28 + 44 + 60 + 76 = 208

This gives us the sum of the series for the first four terms. However, we only need to find the sum of the series when k = 1, which we already calculated to be 28.

Therefore, we can conclude that the answer we found earlier, 28, is indeed the correct sum of the series 4(4k + 3) when k = 1.

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The number of shirts on each rack is n = 24 shirts

Given data ,

Number of shirts = 97

Number of racks = 4

97 shirts / 4 racks = 24.25 shirts per rack

However, it's not possible to have a fraction of a shirt, as shirts are discrete items and cannot be divided into smaller parts. Therefore, we cannot evenly distribute 24.25 shirts on each rack.

On simplifying the equation , we get

In this instance, the remaining is 0.25 shirts, indicating that 0.25 shirts will remain after the shirts have been evenly distributed across the racks. We cannot utilize only a little portion of a garment, thus the rest is usually thrown away or not used.

Hence , it would be most practical to arrange the shirts as evenly as possible, giving each rack 24 shirts. The final shirt might then be put on any of the racks or set aside separately

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The optimal solution is (b) and occurs where x = 1 and y = 0

The given linear program is:

Max Z = 5x + 3y
Subject To: x - y ≤ 6, x ≤ 1

Let's analyze the possible solutions:

a) If the linear program is infeasible, it means that there is no feasible region satisfying all constraints. However, there is a feasible region in this case, so this option is incorrect.

b) If the optimal solution occurs where x = 1 and y = 0, the function value would be Z = 5(1) + 3(0) = 5, and it satisfies the constraints. So, this option is possible.

c) If the objective function value is 5, this corresponds to the result in option b, where x = 1 and y = 0.

d) If the optimal solution occurs where x = 0 and y = 1, the function value would be Z = 5(0) + 3(1) = 3. This solution also satisfies the constraints, but it does not yield the maximum value for the objective function.

Thus, the optimal solution is (b) and occurs where x = 1 and y = 0

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The statement you provided uses the Subtraction Property of Equality. This axiom states that if x = AB + CD + EF + GH, then x - y = AB + CD + EF + GH - y.

The Subtraction Property of Equality is an important axiom in mathematics that allows you to maintain an equation's balance when subtracting the same value from both sides. In your statement, the value 'y' is subtracted from both sides of the equation, maintaining the equal relationship between the expressions.

This property is fundamental in solving algebraic equations, as it helps to isolate variables and determine their values. In this specific case, the subtraction of 'y' from both sides enables you to manipulate the expression and possibly solve for 'x' or 'y' based on the given information.

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The required answer is a combination of weights that can result in a zero standard deviation.

The portfolio with a standard deviation of zero is comprised of Assets A and B. This is because when two assets are perfectly negatively correlated, their returns will cancel each other out, resulting in a portfolio with no risk. On the other hand, it is not possible to determine if the portfolio with a standard deviation of zero is comprised of Assets A and C. This is because the correlation between Assets A and C is unknown, and there may not be a combination of weights that can result in a zero standard deviation.

The standard deviation is a measure of the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range.

The portfolio with a standard deviation of zero is comprised of assets A and B. This means that the combination of these two assets has a perfectly negative correlation, leading to the elimination of the overall risk in the portfolio.The standard deviation of a population or sample and the standard error of a statistic (e.g., of the sample mean) are quite different, but related. The sample mean's standard error is the standard deviation of the set of means that would be found by drawing an infinite number of repeated samples from the population and computing a mean for each sample. The mean's standard error turns out to equal the population standard deviation divided by the square root of the sample size, and is estimated by using the sample standard deviation divided by the square root of the sample size In contrast, a portfolio of assets A and C cannot be determined, as there isn't enough information provided to establish their correlation or the possibility of achieving a standard deviation of zero.

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This is the desired expression for the total solution.

To solve the differential equation, we assume that the solution is of the form y(t) = c(t)eat. Then, we have:

y'(t) = c'(t)eat + aceat

y(0) = c(0)e0a = y

Substituting these into the differential equation, we get:

c'(t)eat + aceat = a(c(t)eat) + bu(t)

Simplifying this equation, we get:

c'(t) = bu(t)e-at

Integrating both sides from 0 to t, we get:

c(t) - c(0) = ∫0t bu(r)e-ar dr

Multiplying both sides by eat, we get:

y(t) - y = e-at(c(0) + ∫0t bu(r)e-ar dr)

Rewriting the right-hand side in terms of a constant c and a function h(t), we get:

y(t) = e-at y + c ∫0t bu(r)e-ar dr

where c = eay and h(t) = bu(t)e-at. This is the desired expression for the total solution.

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The value of dI/da can be obtained by using the chain rule, which states that dI/da = (dI/dt) / (da/dt).

Given that I_dt = Floo and y = cos(4t^2) and y_dt = -8t*sin(4t^2), we can solve for dI/da by finding da/dt when t = 5 and substituting the values in the formula.

Let's first apply the chain rule to the equation y = cos(4t^2) to find dy/dt:

dy/dt = -sin(4t^2) * d/dt (4t^2) = -8t*sin(4t^2)

Next, we can use the given value I_dt = Floo, which means that dI/dt = 1.

To find da/dt, we need to differentiate a with respect to t. However, the value of a is not given explicitly in the equation. Therefore, we need to use the given information that when t = 5, a = -7. This means that we can write the equation for a as follows:

a = 5t - 42

Taking the derivative of both sides with respect to t, we get:

da/dt = 5

Now we can substitute the values we have found into the formula for dI/da:

dI/da = (dI/dt) / (da/dt) = 1 / 5 = 1/5

Therefore, the exact value of dI/da is 1/5.

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Three colours out of six can be used to create any one of 20 different varieties of Rainbow Bomb Pop.

We must apply the combination formula in order to determine how many different varieties of Rainbow Bomb Pop can be created.

The formula is as follows since we need to select three colours from a possible palette of six:

nCr = n / (n-r) r!

where r is the number of items we want to choose, n is the total number of items, and! denotes the factorial function (5! = 5x4x3x2x1, for example).

With the formula, we obtain:

6C3 = 6! / 3!(6-3)!

= 6! / 3!3!

= (6x5x4)/(3x2x1)

= 20.

Factorial in mathematics is a straightforward concept.

Factorials are only goods.

The factorial is indicated by an exclamation point.

The natural numbers that are more than it are multiplied by all the natural numbers that are less than it to get the factor.

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Answer:2.82

Step-by-step explanation:

Using the formula

A=πr2

Solving forr

r=A

π=25

π≈2.82095

r≈2.82

The radius of the circle is approximately 2.82 meters.

To find the radius of a circle with a given area, you can use the formula for the area of a circle:

Area = π * r^2

In this case, the area is 25 square meters:

25 = π * r^2

To solve for the radius (r), first divide both sides of the equation by π:

25/π = r^2

Now, take the square root of both sides to find the value of r:

r = √(25/π)

r ≈ √(25/3.1416)

r ≈ √(7.9577)

r ≈ 2.82

The Jeremy spends $22.27 per day, rounded to 2 decimal places.

the P(A and B) is 0.2500, rounded to 4 decimal places.

the probability of drawing at least one red card is 23/35.

Amount Jeremy spends per day = Mean + (4 * Standard Deviation)

[tex]= $14.27 + (4 * $2.25)[/tex]

= [tex]$22.27[/tex] (rounded to 2 decimal places)

P(A and B) = P(A) * P(B|A)

where P(B|A) is the conditional probability of B given A.

From the information given, we know that P(A) = 0.4000, P(B) = 0.2000, and P(AB) = 0.2500. To find P(B|A), we can use the formula:

P(B|A) = P(AB) / P(A)

Substituting the values we have, we get:

P(B|A) = 0.2500 / 0.4000

= 0.6250

Now, we can calculate P(A and B) using the formula above:

P(A and B) = P(A) * P(B|A)

= 0.4000 * 0.6250

= 0.2500

P(at least one red) = 1 - P(no red)

To calculate P(no red), we need to find the probability of drawing two yellow cards in a row, since there are no red cards left after the first card is drawn.

The probability of drawing a yellow card on the first draw is 9/15, or 3/5. The probability of drawing a yellow card on the second draw, given that the first card was yellow, is 8/14, or 4/7

(since there are now 8 yellow cards and 14 cards total remaining). Therefore, the probability of drawing two yellow cards in a row is:

P(no red) = (9/15) * (8/14)

= 24/70

= 12/35

Using the complement rule, we can now find the probability of drawing at least one red card:

P(at least one red) = 1 - P(no red)

= 1 - 12/35

= 23/35

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The maximum profit per day is $600, and the soft-drink vendor must sell 1,500 cans to achieve this maximum profit.

The profit function for the soft-drink vendor is given by P(x) = -0.001x^2 + 3x - 1800. To find the maximum profit per day and the number of cans to sell for maximum profit, follow these steps:

1. Identify the quadratic function: In this case, it's P(x) = -0.001x^2 + 3x - 1800.

2. Find the vertex of the parabola, which represents the maximum profit point. The x-coordinate of the vertex can be found using the formula x = -b / 2a, where a and b are the coefficients of the quadratic function (a = -0.001, b = 3).

3. Calculate the x-coordinate of the vertex: x = -3 / (2 * -0.001) = -3 / -0.002 = 1500.

4. Substitute the x-coordinate back into the profit function to find the maximum profit: P(1500) = -0.001(1500)^2 + 3(1500) - 1800 = $600.

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The probability of observing no births in a given hour at the hospital is approximately 0.165, or 16.5% when rounded to 3 decimal places.

To find the probability of observing no births in a given hour at the hospital, we'll use the Poisson distribution formula:

P(X = k) = (e^(-λ) * λ^k) / k!

Here, λ (lambda) is the average rate of births per hour (1.8), k is the number of births we want to find the probability for (0 in this case), and e is the base of the natural logarithm (approximately 2.71828).

Step 1: Plug in the values: P(X = 0) = (e^(-1.8) * 1.8^0) / 0!
Step 2: Calculate e^(-1.8) ≈ 0.1653
Step 3: Calculate 1.8^0 = 1
Step 4: Calculate 0! (0 factorial) = 1
Step 5: Substitute the calculated values back into the formula: P(X = 0) = (0.1653 * 1) / 1
Step 6: Simplify the equation: P(X = 0) = 0.1653

The probability of observing no births in a given hour at the hospital is approximately 0.165, or 16.5% when rounded to 3 decimal places.

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The linear function graphed is defined as follows:

y = -2x + 5.

The slope-intercept representation of a linear function is given by the equation presented as follows:

y = mx + b

The coefficients of the function and their meaning are described as follows:

The graph crosses the y-axis at y = 5, hence the intercept b is given as follows:

b = 5.

When x increases by 1, y decays by 2, hence the slope m is given as follows:

m = -2.

Thus the equation of the line is given as follows:

y = -2x + 5.

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Answer:

Yes

Step-by-step explanation:

Dance party playlist:

She has 15 rock songs, and 25 country songs, meaning the ratio is:

15:25

Summer barbecue playlist:

She has 9 rock songs, and 15 country songs, meaning the ratio is:

9:15

Having a ratio is the same as dividing, so for the dance party playlist we can divide 15/25, which is 0.6, and do the same for the summer BBQ playlist, 9/15, which is also 0.6

So, yes, both playlists have the same ratio of both songs.

Suppose we fix a tree 1. The descendent relation on the nodes of T is a strict partial order. So the option d is correct.

The descendent relation on the nodes of a tree T is a strict partial order if, for any two nodes x and y in T, either x is a descendent of y, y is a descendent of x, or neither x nor y is a descendent of the other.

This means that for any two nodes x and y, either x is a parent node, a grandparent node, etc. of y, or y is a parent node, a grandparent node, etc. of x, or neither x nor y is related in any way.

The descendent relation is a strict partial order because it is a partial order (it is reflexive, antisymmetric, and transitive) and it is also strict (neither x nor y can be a descendent of the other). So the option d is correct.

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The mass of the neptunium-230  is 6.25 g

The mass of the plutonium is 3 mg

The duration it takes for half of a substance to deteriorate or disappear is known as its half-life. This idea is frequently used to describe the breakdown of certain chemicals .

We know that;

N/No = (1/2)^t/t1/2

N = Mass left at time t

No = amount initially present

t = time taken

t1/2 = half life

Then;

N/100 = (1/2)^18.4/4.6

N = (1/2)^18.4/4.6 * 100

N = 6.25 g

The amount of the plutonium left is;

N/No = (1/2)^t/t1/2

N/12.8 =  (1/2)^250/120

N =  (1/2)^250/120 * 12.8

N = 3 mg

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Yhey have infinitely many solutions, since any point on the line satisfies both equations.

Given the system of equation in the question;

y = -2x + 2

2y + 4x = 4

To find the number of solutions, we can solve for y in the first equation and substitute it into the second equation:

y = -2x + 2

Plug y = -2x + 2 into the second equation.

2( -2x + 2 ) + 4x = 4

Simplify and solve for x.

-4x + 4 + 4x = 4

4 = 4

Since this equation is always true.

Option C) infinitely many solutions is the correct answer.

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