Identify the surface whose equation is given.rho=cos ϕ

a) The expected value is -6.8 and the standard error is 0.5.

b) The probability that the sample mean is less than -7 is 0.0548.

c) The probability that the sample mean falls between -7 and -6 is 0.8904.

population mean, which is -6.8.

The following formula may be used to get the standard error of the sampling distribution of the sample mean:

SE = σ/√n

Substituting the given values, we get:

SE = 3/√36 = 0.5

Therefore, the expected value is -6.8 and the standard error is 0.5.

b. To find the probability that the sample mean is less than -7, we need to standardize the sample mean using the formula:

z = (X- μ) / (σ / √n)

where X is the sample mean, μ is the population mean, σ is the population standard deviation, and n is the sample size.

Substituting the given values, we get:

z = (-7 - (-6.8)) / (3 / √36) = -0.8 / 0.5 = -1.6

Using a standard normal distribution table or calculator, we find that the probability of getting a z-score less than -1.6 is 0.0548.

The probability that the sample mean is less than -7 is 0.0548.

c. To find the probability that the sample mean falls between -7 and -6, we need to standardize both values using the same formula as above and subtract the probabilities:

z1 = (-7 - (-6.8)) / (3 / √36) = -1.6

z2 = (-6 - (-6.8)) / (3 / √36) = 1.6

Using a standard normal distribution table or calculator, we find that the probability of getting a z-score less than -1.6 is 0.0548 and the probability of getting a z-score less than 1.6 is 0.9452. Therefore, the probability of getting a z-score between -1.6 and 1.6 is:

P(-1.6 < z < 1.6) = 0.9452 - 0.0548 = 0.8904

To learn more about probability visit: https://brainly.com/question/30034780

#SPJ11

The area of the shaded sector is 9.5 square units.

We know that the formula for the area of sector of circle is:

A = (θ/360°) × π × r²

where the central angle θ is measured in degrees

and r is the radius of the circle

Here, the central angle is θ = 120° and the radius of the circle is r = 3 units

Using above formula the area of the shaded sector would be,

A = (θ/360°) × π × r²

A = (120°/360°) × π × 3²

A = 1/3 × π × 9

A = 3 × π

A = 9.5 sq. units

Thus the required area is 9.5 sq.units

Learn more about the sector of circle here:

https://brainly.com/question/15591260

#SPJ1

Answer: So the probability that both students have reaction times greater than or equal to 9 seconds is approximately 0.0251 or 2.51%.

Step-by-step explanation:

However, assuming that you are referring to a hypothetical scenario where two students are chosen at random from a larger population, and that their reaction times follow a normal distribution with a mean of μ and a standard deviation of σ, the probability that both students have reaction times greater than or equal to 9 seconds can be calculated as follows:

Let X1 and X2 be the reaction times of the first and second students, respectively. Then, we can write:

P(X1 ≥ 9 and X2 ≥ 9) = P(X1 ≥ 9) * P(X2 ≥ 9 | X1 ≥ 9)

Since the students are chosen at random, we can assume that their reaction times are independent, which means that:

P(X2 ≥ 9 | X1 ≥ 9) = P(X2 ≥ 9)

Now, if we assume that the reaction times follow a normal distribution, we can standardize them using the z-score:

z = (X - μ) / σ

where X is the reaction time, μ is the mean, and σ is the standard deviation. Then, we can use a standard normal distribution table to find the probability that a random variable Z is greater than or equal to a certain value z. In this case, we have:

P(X ≥ 9) = P(Z ≥ (9 - μ) / σ)

Assuming that μ = 8 seconds and σ = 1 second, we can calculate:

P(X ≥ 9) = P(Z ≥ 1)

Using a standard normal distribution table, we can find that P(Z ≥ 1) ≈ 0.1587.

Therefore:

P(X1 ≥ 9 and X2 ≥ 9) = P(X1 ≥ 9) * P(X2 ≥ 9 | X1 ≥ 9)

= P(X ≥ 9) * P(X ≥ 9)

= (0.1587) * (0.1587)

≈ 0.0251

So the probability that both students have reaction times greater than or equal to 9 seconds is approximately 0.0251 or 2.51%.

The surface area of the triangular prism is 5166 square inches.

We need to find the area of the triangular face. The area of a triangle is given by the formula:

Area = (1/2) × base × height

Area = (1/2) × 42 × 28

= 588 square inches

The total surface area of those two faces is 2 times the area we just calculated:

Total area of the two triangular faces = 2 × 588

= 1176 square inches

Area of each rectangular face = length× width

= 38 × 35

= 1330 square inches

There are 3 rectangular faces

The total area of those three faces is 3 times the area

Total area of the three rectangular faces = 3 × 1330

= 3990 square inches

Total surface area of the triangular prism by adding together the areas of the two triangular faces and the three rectangular faces:

Total surface area = Total area of the two triangular faces + Total area of the three rectangular faces

Total surface area = 1176 + 3990 = 5166 square inches

Therefore, the surface area of the triangular prism is 5166 square inches.

To learn more on Three dimensional figure click:

https://brainly.com/question/2400003

#SPJ1

The steps to solve percent proportions using table are added below

To solve percent proportions using a table, follow these steps:

For example, to find what percent of 80 is 24, you would create a table with "Amount" and "Percent" columns.

Write "x" in the "Amount" column and "0.24" in the "Percent" column. Divide 80 by 0.24 to get x = 333.33.

To check, multiply 0.24 by 333.33 to get 80.

Read more about percentage at

https://brainly.com/question/24877689

#SPJ1

So, to answer your question, we need to understand what a subgroup and a set are in the context of group theory.

A set is simply a collection of elements. In group theory, we are interested in sets that have some kind of structure or relationship between the elements.

A subgroup is a subset of a group that is itself a group under the same operation as the original group. In other words, a subgroup is a subset of the group that has the same properties as the group itself.

Now, let's apply these concepts to your question.

You have a group g, and you want to find a subgroup g0 that is generated by a certain set s. The set s contains five elements: x, y, x^-1, y^-1, and xy.

To generate a subgroup, we need to take all possible combinations of the elements in the set s and see what new elements we can create. In this case, we can combine x and y to get xy. We can also combine xy with x^-1 to get y, and with y^-1 to get x.

So, the subgroup g0 generated by the set s contains the elements x, y, x^-1, y^-1, and xy. It also contains any elements that can be created by taking products of these elements. For example, we can take the product xy * x^-1 = y, so y is also in the subgroup.

In summary, the subgroup g0 generated by the set s contains the elements x, y, x^-1, y^-1, and xy, as well as any elements that can be created by taking the products of these elements.

To learn more about “subgroup” refer to the https://brainly.com/question/30865357

#SPJ11

The probability distribution is:

P(x < 0) = 0
P(0 ≤ x < 1) = 1/2
P(1 ≤ x < 2) = 3/5
P(2 ≤ x < 3) = 4/5
P(3 ≤ x < 3.5) = 9/10
P(x ≥ 3.5) = 0

To find the probability distribution, we need to calculate the probability of each value of x. We can do this by looking at the ranges defined by the distribution function and calculating the area under the curve for each range.

For x < 0, the probability is 0 since there is no area under the curve in this range.

For 0 ≤ x < 1, the probability is 1/2 since the area under the curve in this range is equal to the height (which is 1/2) multiplied by the width of the range (which is 1).

For 1 ≤ x < 2, the probability is 3/5 since the area under the curve in this range is equal to the height (which is 3/5) multiplied by the width of the range (which is 1).

For 2 ≤ x < 3, the probability is 4/5 since the area under the curve in this range is equal to the height (which is 4/5) multiplied by the width of the range (which is 1).

For 3 ≤ x < 3.5, the probability is 9/10 since the area under the curve in this range is equal to the height (which is 9/10) multiplied by the width of the range (which is 0.5).

Therefore, the probability distribution is:

P(x < 0) = 0
P(0 ≤ x < 1) = 1/2
P(1 ≤ x < 2) = 3/5
P(2 ≤ x < 3) = 4/5
P(3 ≤ x < 3.5) = 9/10
P(x ≥ 3.5) = 0

To learn more about probability here:

brainly.com/question/30034780#

#SPJ11

If 0 < x < 5, the sides of triangle FGH are FG, GH, and FH in descending order.

The measure of each angle of a triangle is related to the length of its opposite side by the law of sines. We can use this law to write:

FH/sin(H) = FG/sin(F) = GH/sin(G)

We wish to arrange the sides in descending order, which implies we must compare their ratios to the sines of their respective angles. Because sin(F) decreases for 0 x 180/15 = 12, we know that FG will be the smaller side if sin(F) is the denominator in the FG/sin(F) calculation.

Similarly, GH will be the smallest side, while FH would be the largest. We need 0 < x < 5 to ensure that the angles are acute (and hence sin(F), sin(G), and sin(H) are positive). As a result, the sides of triangle FGH are, from least to biggest, FG, GH, and FH if 0 x 5.

To know more about triangle, visit,

https://brainly.com/question/17335144

#SPJ4

We get a total degree of freedom of 44 for the study.

To determine the degrees of freedom (df) for the study,

In many scientific fields, the degrees of freedom of a system is the number of parameters of the system that may vary independently. For example, a point in the plane has two degrees of freedom for translation: its two coordinates; a non-infinitesimal object on the plane might have additional degrees of freedoms related to its orientation.

we need to subtract 1 from the sample size of each group and then add those values together.

For group 1, df would be 25 - 1 = 24, and for group 2, df would be 21 - 1 = 20. Adding these values together, we get a total df of 44 for the study.

learn more about degrees of freedom

https://brainly.com/question/31424137

#SPJ11

The expression can be written as [tex]5x + 2 = 4[/tex] and the value of y is 0.4.

Expression in math is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that five times, the sum of a number and 2 equals 4. the expression can be written as,

[tex]5x + 2 = 4[/tex]

[tex]5x = 4 - 2[/tex]

[tex]5x = 2[/tex]

[tex]x = \dfrac{2}{5} = 0.4[/tex]

To know more about an expression follow

brainly.com/question/25968875

Answer:

m= -5

skiskiski

The following statements are true regarding the indirect proof method:

You cannot use an indirect proof sequence within the scope of another indented sequence.

The explicit contradiction on the last line of an indirect proof sequence must contain the same proposition letters as those in the assumption beginning the sequence.

If you can derive an explicit contradiction from an assumption beginning an indented sequence, then the assumption must be false.

You should justify the assumption beginning an indirect proof sequence with the abbreviation "AIP" without citing any line numbers.

You can correctly use line numbers from an indirect proof sequence that has been discharged as justification for subsequent lines.

You cannot cite line numbers from an indented indirect or conditional proof sequence that has already been discharged as justification for any subsequent lines.

The proposition (ZV F) (ZV F) cannot serve as the last indented line of an indirect proof sequence.

No proof can end with an indented line.

Therefore, the above statements are true based on the principles of indirect proof method.

To learn more about indirect proof method here:

brainly.com/question/2034189#

#SPJ11

The nullity of A is at least k, and the rank of A is at most n - k (by the rank-nullity theorem). Therefore, the rank of A is less than n, as required.

To prove that the rank of A is less than n, we can use the fact that the nullity of A is at least k.

Let's start by defining the nullity of A. The nullity of A is the dimension of the null space of A, which is the set of all vectors x such that Ax = 0.

Since A is nilpotent of index k, we know that Ak = 0. This means that the nullspace of A contains all eigenvectors of A with eigenvalue 0, and also contains all linear combinations of these eigenvectors.

We can show that the nullity of A is at least k by using the fact that Ak = 0. Suppose the nullity of A is less than k. Then, there exists a nonzero vector x such that Ax = 0. Applying A to both sides of this equation, we get A^2x = 0. Similarly, applying A to both sides of A^2x = 0, we get A^3x = 0. Continuing in this way, we get Akx = 0, which contradicts the fact that Ak = 0 and x is nonzero.

Learn more about the nilpotent matrix: https://brainly.com/question/31472736

#SPJ11

The nullity of A is at least k, and the rank of A is at most n - k (by the rank-nullity theorem). Therefore, the rank of A is less than n, as required.

To prove that the rank of A is less than n, we can use the fact that the nullity of A is at least k.

Let's start by defining the nullity of A. The nullity of A is the dimension of the null space of A, which is the set of all vectors x such that Ax = 0.

Since A is nilpotent of index k, we know that Ak = 0. This means that the nullspace of A contains all eigenvectors of A with eigenvalue 0, and also contains all linear combinations of these eigenvectors.

We can show that the nullity of A is at least k by using the fact that Ak = 0. Suppose the nullity of A is less than k. Then, there exists a nonzero vector x such that Ax = 0. Applying A to both sides of this equation, we get A^2x = 0. Similarly, applying A to both sides of A^2x = 0, we get A^3x = 0. Continuing in this way, we get Akx = 0, which contradicts the fact that Ak = 0 and x is nonzero.

Learn more about the nilpotent matrix: https://brainly.com/question/31472736

#SPJ11

The probability that Erin will get at least one bullseye is given as follows:

55%.

A probability is calculated as the division of the desired number of outcomes by the total number of outcomes in the context of a problem/experiment.

The total number of trials is given as follows:

1000 trials.

The number of trials with zero hits is given as follows:

450 trials.

Hence the number of trials with at least one hit is given as follows:

1000 - 450 = 550 trials.

Hence the probability is given as follows:

p = 550/1000

p = 0.55.

p = 55%.

More can be learned about probability at https://brainly.com/question/24756209

#SPJ1

a. 6m + 8n is even.

b. 10mn + 7 is odd.

c. It cannot be determined whether [tex]m^2 - n^2[/tex] is composite based solely on the given information.

To determine the properties of given mathematical expressions, specifically whether they were even, odd, or composite, based on the definitions of these terms.

a. To determine whether 6m + 8n is even, we can use the definition of even integers, which states that an integer is even if it is divisible by 2.

We can factor out 2 from the expression to get 2(3m + 4n). Since 2 is a factor of this expression, it follows that 6m + 8n is even.

b. To determine whether 10mn + 7 is odd, we can use the definition of odd integers, which states that an integer is odd if it is not divisible by 2.

If 10mn + 7 were even, then it would be divisible by 2, which means we can write it as 2k for some integer k.

But this leads to 10mn + 7 = 2k, which is not possible because the left-hand side is odd and the right-hand side is even. Therefore, 10mn + 7 is odd.

c. To determine whether [tex]m^2 - n^2[/tex] is composite, we need to use the definitions of prime and composite integers.

An integer is prime if it is only divisible by 1 and itself, and it is composite if it is divisible by at least one positive integer other than 1 and itself.

We can factor [tex]m^2 - n^2[/tex] as (m + n)(m - n). Since m > n > 0, both m + n and m - n are positive integers, and neither of them is equal to 1 or [tex]m^2 - n^2[/tex].

Therefore, if [tex]m^2 - n^2[/tex] is composite, it must be divisible by a positive integer other than 1, m + n, and m - n.

However, we cannot determine whether such a divisor exists without knowing the specific values of m and n.

Therefore, we cannot determine whether [tex]m^2 - n^2[/tex] is composite based solely on the given information

Learn more about even, odd, or composite

brainly.com/question/17518600

#SPJ11

P(Z <= 0.9) is approximately 0.8159.

To find P(Z <= 0.9), you can use the standard normal distribution table, which provides the probabilities for standard normal random variables.

Step 1: Locate the row for 0.9 on the Z-table.
Step 2: Find the corresponding probability in the table.

The standard normal distribution table, also known as the Z-table, is used to find the probability that the standard normal random variable, Z, is less than or equal to a given value. In this case, we want to find P(Z <= 0.9). To do this, locate the row for 0.9 in the table and find the corresponding probability.

The table provides probabilities for values of Z up to two decimal places. For Z = 0.9, the probability is approximately 0.8159, meaning there is an 81.59% chance that Z will be less than or equal to 0.9.

To know more about standard normal distribution table click on below link:

https://brainly.com/question/30404390#

#SPJ11

complete question:

Suppose That Z Is The Standard Normal Random Variable And We Have P(0<z<a)=0.2054. Determine the value of  P(Z <= 0.9) .

The statement is true that If lim n→∞ an = l, then lim n→∞ a2n = l.

Since the limit value of the sequence an as n approaches infinity is l, this means that as n becomes very large, the terms of the sequence an approach l.

When we consider the subsequence a2n, we are taking every second term of the original sequence.

As n approaches infinity in this subsequence, the terms still approach l, because the overall behavior of the original sequence dictates the behavior of any subsequence. Therefore, lim n→∞ a2n = l.

To know more about limit value  click on below link:

https://brainly.com/question/29896874#

#SPJ11

So the composition that correctly defines N(x) is A gog.

To find the composition of functions that defines N(x) = x - 8, we can start with the function N(x) = x - 8 and work backwards by composing it with the given functions f(x), g(x), and h(x).

Starting with N(x) = x - 8, we can see that:

N(x) = (x + 4) - 12

This is because g(x) = x - 4, so g(h(x)) = x - 4 - 4 = x - 8, and f(x) = x, so f(g(h(x))) = x. Therefore, we can write:

N(x) = f(g(h(x))) - 12

This means that we first apply the function h(x), then g(x), and finally f(x), and subtract 12 from the result. Specifically:

N(x) = (x * - 4) - 12

= (x - 4) - 12

= x - 16

= x - 8 - 8

This shows that N(x) can be obtained by first subtracting 8 from x (using the function h(x)), then subtracting 4 from the result (using the function g(x)), and finally subtracting another 4 (using the function f(x)).

However, this is not the same as the given expression x - 8, so the correct answer is (A) gog, as mentioned in the previous answer.

Learn more about composition of functions

brainly.com/question/5614233

#SPJ11

For the sequence tan(5nπ/3+20n) , it oscillates and does not approach a finite limit or diverge to infinity this implies lim n tends to infinity an = DNE.

To determine whether the sequence converges or diverges, we need to examine the behavior of the function tan(5nπ/3+20n) as n approaches infinity.

First, note that the argument of the tangent function (5nπ/3+20n) will approach infinity as n approaches infinity, since both 5nπ/3 and 20n grow without bound.

When the argument of the tangent function approaches an odd multiple of pi/2 (i.e. π/2, 3π/2, 5π/2, etc.), the function itself diverges to positive or negative infinity (depending on the sign of the coefficient of π/2).

Since 5nπ/3+20n does not approach any odd multiple of π/2 as n approaches infinity, we cannot use this divergence criterion to determine whether the sequence converges or diverges.

Instead, we can try to find a subsequence of an that converges or diverges. However, after some algebraic manipulation, we can show that any two consecutive terms of the sequence have opposite signs, and thus the sequence oscillates infinitely between positive and negative values.

Since the sequence oscillates and does not approach a finite limit or diverge to infinity, we can say that lim n tends to infinity an = DNE.

Learn more about tangent function : https://brainly.com/question/1533811

#SPJ11

Answer:

314.00 inches

Step-by-step explanation:

r=12.5

every revolution = circumference = 2π r = 25π

4 times that = 100π =314

Answer:

12

Step-by-step explanation:

Mode is the number that shows up the most in a data set.

The numbers: 8, 6, 12, 5, 15, 12, 3, 10, 9

Number 12 shows up the most in the list, so the mode is 12.

The probability that three customers will return the merchandise for exchange is 0.08192 and probability that four customers will return the merchandise for exchange is 0.01536 and the probability that none of the customers will return the merchandise for exchange is 0.262144.

Explanation: -

Part (a). The probability that three customers will return the merchandise for exchange can be calculated using the binomial probability formula: P(X=k) = C(n,k) * p^k * (1-p)^(n-k), where n is the number of trials (6 purchases), k is the desired number of successes (3 returns), and p is the probability of success (20%).

In this case, P(X=3) = C(6,3) * 0.2^3 * 0.8^3

                               = 20 * 0.008 * 0.512  

                               = 0.08192.

Part (b). The probability that four customers will return the merchandise for exchange can be calculated similarly:

P(X=4) = C(6,4) * 0.2^4 * 0.8^2

           = 15 * 0.0016 * 0.64  

           = 0.01536.

c. The probability that none of the customers will return the merchandise for exchange is calculated with k=0:

P(X=0) = C(6,0) * 0.2^0 * 0.8^6

            = 1 * 1 * 0.262144

            = 0.262144.

d. The better return policy cannot be determined solely based on these probabilities, as they only describe the likelihood of specific scenarios occurring. A better return policy would depend on factors such as customer satisfaction, cost of processing returns, and potential for increased sales due to a favorable return policy. These factors should be considered when evaluating the overall effectiveness and desirability of a return policy.

Know more about the "binomial probability formula" click here:

https://brainly.com/question/30764478

#SPJ11

The sum of the given geometric series is 4/(1+3z) and  the domain of convergence is (-1/3, 1/3).

The domain in which the series converges is (-1/3, 1/3) because for the series to converge, the absolute value of the common ratio (r) must be less than 1.

In this case, r = -3z, so the absolute value of r is less than 1 if and only if |z| < 1/3. Therefore, the domain of convergence is (-1/3, 1/3).

A geometric series is a series in which each term is a constant multiple of the preceding term. In this case, the first term is 4 and each subsequent term is obtained by multiplying the preceding term by -3z/3. Therefore, the series can be written as:

4 - 12z + 36z² - 108z³ + ...

To find the sum of the series, we 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. In this case, a = 4 and r = -3z/3 = -z. Therefore, the sum of the series is:

S = 4/(1+z)

To determine the domain of convergence, we need to find the values of z for which the absolute value of r is less than 1. That is, we need to find the values of z for which |z| < 1/3. Therefore, the domain of convergence is (-1/3, 1/3).

To know more about geometric series, refer here:
https://brainly.com/question/4617980#
#SPJ11

The double integral of f(x,y) = 3 - 8 over the given triangle with vertices (0,0), (2,5), and (6,5) is equal to -24.

To solve the double integral of f(x,y) over the given triangle, we need to set up the limits of integration. Let's first sketch the triangle:

(0,0)     (2,5)

  *--------*

  |       / \

  |      /   \

  |     /     \

  |    /       \

  |   /         \

  |  /           \

  |/_______\

(6,5)

We can see that the triangle is bounded by the lines y = 0, y = 5, and the line connecting (2,5) and (6,5), which has the equation y = -5/4 x + 15/2. We can find the limits of integration as follows:

y = 0 to y = 5

x = 0 to x = (y-5)/(-5/4)

Thus, the double integral can be written as:

∬(triangle) f(x,y) dA

= ∫(0 to 5) ∫(0 to (y-5)/(-5/4)) (3 - 8) dx dy

= ∫(0 to 5) [(3 - 8) * (y-5)/(-5/4)] dy

= ∫(0 to 5) (-3.2y + 16) dy

= [-1.6y^2 + 16y] from 0 to 5

= -24

Therefore, the double integral of f(x,y) over the given triangle with vertices (0,0), (2,5), and (6,5) is equal to -24.

For more questions like Integral click the link below:

https://brainly.com/question/18125359

#SPJ11

The boys' data has a greater degree of variability

The table displays the number of cheesy biscuits within lunchboxes for a group of 18 children, comprising 9 boys and 9 girls.

It outlines individual values for both sets of data:

Boys: 5, 7, 9, 11, 13, 15, 18, 20, 22

Girls: 8, 10, 12, 12, 13, 14, 15, 16, 18.

Upon calculating the interquartile range (IQR) for each respective dataset.

The following values were obtained: Boys' IQR calculates to an approximately higher value of 11 as compared to the girls who have an IQR of nearly five points lower than that of the former at only five points in magnitude.

Read more about interquartile range here:

https://brainly.com/question/4102829

#SPJ1

The table below represents the number of cheese crackers in the lunchboxes of 9 boys and 9 girls:

Boys Girls

5 8

7 10

9 12

11 12

13 13

15 14

18 15

20 16

22 18

Examining the table, is the degree of variability in the boys' data greater, lesser, or equal to the girls'? Work out the interquartile range of each set. Utilizing the interquartile range, compare the magnitude of variability between the two sets. Describe how the comparison affirms your first answer.

To answer this question, we need to use the properties of exponential distribution and the Richter scale.
First, let's note that the Richter scale is a logarithmic scale, meaning that each whole number increase represents a tenfold increase in the amplitude of the earthquake.

So an earthquake of magnitude 5 is ten times more powerful than an earthquake of magnitude 4, and 100 times more powerful than an earthquake of magnitude 3.
Given that the magnitudes of earthquakes in California follow an exponential distribution with a mean of 4 on the Richter scale, we can use the formula for exponential distribution:
f(x) = λe^(-λx)
where λ = 1/4, since the mean is 4.
To find the probability that an earthquake exceeds magnitude 5, we need to integrate the exponential distribution from 5 to infinity:
P(X > 5) = ∫[5,∞] λe^(-λx) dx
= e^(-λx) |_5^∞
= e^(-λ*5)
= e^(-5/4)
= 0.0821
So the probability that an earthquake exceeds magnitude 5 is approximately 0.0821, or 8.21%.
To find the probability that the magnitude of the next earthquake is more than 2 standard deviations above its mean, we need to use the formula for standard deviation of exponential distribution:
SD(X) = 1/λ
= 4
So 2 standard deviations above the mean is:
4 + 2*4 = 12
We want to find the probability that X > 12:
P(X > 12) = ∫[12,∞] λe^(-λx) dx
= e^(-λx) |_12^∞
= e^(-λ*12)
= e^(-3)
= 0.0498
So the probability that the magnitude of the next earthquake is more than 2 standard deviations above its mean is approximately 0.0498, or 4.98%.

FOR MORE INFIRMATION ON Richter scale SEE:

https://brainly.com/question/4089234

#SPJ11

The equation that relates da/[tex]dt[/tex] to dx/[tex]dt[/tex] is da/[tex]dt[/tex] = 12x(dx/[tex]dt[/tex]). We can use the chain rule to solve the above question.

The chain rule states that if y is a function of u, and u is a function of x, then

dy/dx = dy/du * du/dx

In this case, we have a = 6x^2, where a is a function of t, and x is a function of t. Therefore, we can apply the chain rule as follows:

da/dt = d(6x^2)/dt = (d/dt)(6x^2) = 12x(dx/dt)

Here, we have used the product rule of differentiation for differentiating 6x^2 concerning t.

So, the final equation that relates da/[tex]dt[/tex] to dx/[tex]dt[/tex] is da/[tex]dt[/tex] = 12x(dx/[tex]dt[/tex]). This equation shows that the rate of change of the area (da/[tex]dt[/tex]) is proportional to the rate of change of the dimension x (dx/[tex]dt[/tex]) with a constant of proportionality equal to 12x.

To learn more about the chain rule, visit:

https://brainly.com/question/30764359

#SPJ11

True. It is not necessary to assume the distribution of the population data is normally distributed.

According to the Central Limit Theorem, regardless of the form of the population distribution, if we select a random sample of size n from any population, the distribution of the sample means will be about normal for large sample sizes. Because it enables us to draw conclusions about population parameters from sample statistics, including the sample mean and standard deviation, the theorem is crucial in statistics. In hypothesis testing, confidence interval estimation, and other statistical approaches, the Central Limit Theorem is frequently utilised.

As long as the sample size is sufficient (often n > 30 is regarded sufficient), the central limit theorem states that the distribution of the sample means approaches a normal distribution regardless of the form of the population distribution. Because of this, it is not required to assume that population data is regularly distributed.

Learn more about normal distribution here:

https://brainly.com/question/31197941

#SPJ1

Answer:

n=6

Step-by-step explanation:

If you see, you need to move the decimal 6 places to the right to get to  5690000

The correct order to draw the angle bearing of 55° at a point is as follows:

Draw a vertical line from point X to represent North. Option D.

Place the centre of the protractor on point X and 0° on the North line. Option B.

Make a mark at 55°. Option C

Draw a line from point X through the mark. Option A.

An angles can be drawn from a point using a protractor to measure the angle of its bearing before joining the formed angle.

The correct steps that should be used include the following;

Learn more about angles here:

https://brainly.com/question/25215131

#SPJ1