Assume the results of a an empirical study reveal the following: n= 250, sample mean = 140, sample standard deviation =22. The standard error of the sample mean is closest to 1.39 22 2.72 14

Answer:

I believe the correct answer is A, but don't take my word until you know for sure <3

Step-by-step explanation:

Answer:

B) c < -a

Step-by-step explanation:

I hope this helps!

Answer:

(0,6) and (-2, 0)

Step-by-step explanation:

All straight lines follow the equation, y = mx + c. where c is the y-intercept (the point where the line meets the y-axis) and m is the gradient.

In this equation, c = 6. So, the point where the line meets the y-axis is (0, 6).

Remember: the point where the line meets the y-axis always has an x-coordinate of 0 and the point where the line meets the x-axis has a y-coordinate of 0.

using this information, we can substitute y in the equation with 0 becoming

0 = 6 + 3x

now we can solve for x.

0 -6 = 3x

-6 / 3 = x

x = -2

the coordinate is (-2, 0)

Answer:

Step-by-step explanation:

The slopes of both those lines are the same so there is no solution. Use slope triangles to find out the slope. They are both 1/4.

A. No solution

y = 1/4x+5

x - 4y = 4

You can simplify the second equation into y = 1/4x - 1

Since these equations both have the same slope, they are parallel. When two lines are parallel, they have no solutions.

a. The value corresponding to surviving the year is $0, and the value corresponding to not surviving the year is -$90,000.

b. The expected value for the 33-year-old male purchasing the policy is -$579.06.

c. Yes, the insurance company can expect to make a profit from many such policies because the expected profit per 33-year-old male insured for 1 year is $408.06.

a. The monetary value corresponding to surviving the year is $0 because the individual would not receive any payout from the insurance policy if he survives. The monetary value corresponding to not surviving the year is -$90,000 because in the event of the individual's death, the policy pays out a death benefit of $90,000.

b. To calculate the expected value for the 33-year-old male purchasing the policy, we need to multiply the probability of each event by its corresponding monetary value and sum them up. The probability of surviving the year is 0.9988, and the value corresponding to surviving is $0. The probability of not surviving the year is (1 - 0.9988) = 0.0012, and the value corresponding to not surviving is -$90,000.

Expected value = (Probability of surviving * Value of surviving) + (Probability of not surviving * Value of not surviving)

Expected value = (0.9988 * $0) + (0.0012 * -$90,000)

Expected value = -$108 + -$471.06

Expected value = -$579.06 (rounded to the nearest cent)

c. The insurance company can expect to make a profit from many such policies because the expected value for the 33-year-old male purchasing the policy is negative (-$579.06). This means, on average, the insurance company would pay out $579.06 more in claims than it collects in premiums for each 33-year-old male insured for 1 year. Therefore, the insurance company expects to make an average profit of $579.06 on every 33-year-old male it insures for 1 year.

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Answer:

x<12

Step-by-step explanation:

Let's solve your inequality step-by-step.

−3< x/ −4

Step 1: Simplify both sides of the inequality.

−3< −1/ 4 x

Step 2: Flip the equation.

−1/ 4 x>−3

Step 3: Multiply both sides by 4/(-1).

( 4/ −1 )*( −1/ 4 x)>( 4 /−1 )*(−3)

x<12

Answer:

x<12

To enumerate all the numbers between 60 and 70 that are divisible by both 4 and 5, we need to check each number in that range and see if it satisfies both conditions.

The answer to the question "Enumera toate numerele cuprinse intre 60 si 70 care pot fi impartite exact la 4 si la 5" is:
Numerele cuprinse intre 60 si 70 care pot fi impartite exact la 4 si la 5 sunt 60.

The explanations are given as follows:
Let's start with the number 60. We check if 60 is divisible by 4 by dividing it by 4 and seeing if the remainder is 0. In this case, 60 divided by 4 gives us a remainder of 0, so it is divisible by 4. Next, we check if 60 is divisible by 5 in the same way. Again, 60 divided by 5 gives us a remainder of 0, so it is divisible by 5 as well. Therefore, 60 satisfies both conditions and can be included in our list.
Moving on to the next number, 61, we repeat the same process. We divide 61 by 4 and 61 by 5 and check if the remainders are 0. If any remainder is not 0, then the number is not divisible by both 4 and 5. In this case, 61 is not divisible by either 4 or 5, so we exclude it from our list.
We continue this process for each number between 60 and 70. The numbers that satisfy both conditions, being divisible by 4 and 5, are included in our final list.
Based on this process, the number between 60 and 70 that can be divided exactly by both 4 and 5 is 60

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Answer:

150< x ≤ 250

Step-by-step explanation:

Couldn't be bothered

Answer:

50% of 30 is 15. 25% of 40 is 10. So, the product of 50% of 30 and 25% of 40 is 150.

Here's the calculation:

```

(50/100) * 30 * (25/100) * 40 = 150

```

Step-by-step explanation:

The effective annual rate (EAR) for the investment account with a return of 14.00% (APR) compounded quarterly can be calculated using the formula:

EAR = (1 + (APR / n))^n - 1

Where APR is the annual percentage rate and n is the number of compounding periods per year. In this case, since interest is compounded quarterly (every 3 months), n would be 4.

Plugging in the values, we have:

EAR = (1 + (0.14 / 4))^4 - 1

Calculating this expression, we find that the effective annual rate is 14.62%.

The effective annual rate (EAR) is a measure of the true annual interest rate taking into account the effects of compounding. It allows for easy comparison of different interest rates that compound over different periods.

In this scenario, the investment account has an annual percentage rate (APR) of 14.00%, which represents the nominal interest rate per year. However, the interest is compounded quarterly, meaning it accrues and is added to the account balance every 3 months. To determine the actual annual rate accounting for compounding, we calculate the effective annual rate (EAR).

By using the formula mentioned above and plugging in the values, we can calculate the EAR. The APR is divided by the number of compounding periods per year (4, in this case), and then 1 is added to this result. The entire expression is raised to the power of the number of compounding periods per year (4) and then subtracted by 1.

The resulting EAR is 14.62%, indicating the equivalent annual rate considering the effects of compounding on the investment account.

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Scientists found an animal skull during an excavation and tested the amount of carbon -14 left in it. They found that 55 percent of the carbon-14 in the skull remained.

55% of the Carbon is left in the skull.

If A₀ was the original amount of Carbon, the amount of Carbon that is remaining will be 55% of A₀  which equals 0.55A₀

Using the given equation:

\(A = A_{o}e^{-0.000124t}\\\\ 0.55A_{o} = A_{o}e^{-0.000124t}\\ \\0.55 = e^{-0.000124t}\\\\In(0.55) = In(e^{-0.000124t})\\\\In(0.55) = -0.000124t*In(e)\\\\In(0.55) = -0.000124t\\\\\)

\(t = \frac{In(0.55)}{-0.000124} \\\\t = 4821\)

Rounding of to nearest year, we can conclude that the animal was buried 4821 years ago.

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The Laplace transform of the given function f(t) is L[f(t)] = -6/s³- 72/s³

To find the Laplace transform of the given function f(t) use the linearity property of the Laplace transform and the known Laplace transforms of the Heaviside function u(t) and its powers.

The Laplace transform of (t - 4)u²(t) found as follows:

L[(t - 4)u²(t)] = L[tu²(t) - 4u²(t)]

= L[tu²(t)] - L[4u²(t)]

Now, let's find the Laplace transforms of each term separately.

Using the time-shifting property of the Laplace transform,

L[tu²(t)] = e(-s × 0) × L[u²(t)]' (taking the derivative of u²(t))

= L[u²(t)]'

= -d/ds [L[u(t)]²] (using the Laplace transform of u(t) and the derivative property of the Laplace transform)

The Laplace transform of u(t) is 1/s, so

L[u²(t)]' = -d/ds [(1/s)²]

= -d/ds [1/s²]

= 2/s³

Similarly, for L[4u²(t)],

L[4u²(t)] = 4 × L[u²(t)]

= 4 × 2/s³

= 8/s³

Now, let's combine the results:

L[(t - 4)u²(t)] = -d/ds [L[u(t)]²] - 8/s³

= -d/ds [(1/s)²] - 8/s³

= -d/ds [1/s²] - 8/s³

= 2/s³ - 8/s³

= -6/s³

Next, let's find the Laplace transform of (t - 2)u²(t):

L[(t - 2)u²(t)] = L[tu²(t)] - L[2u²(t)]

Using similar steps as before, we find:

L[tu²(t)] = -d/ds [L[u(t)]²]

= -d/ds [(1/s)²]

= -24/s²

L[2u²(t)] = 2 × L[u²(t)]

= 2 × 24/s²

= 48/s³

Combining the results

L[(t - 2)u²(t)] = -24/s² - 48/s²

= -72/s³

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Answer:

D

Step-by-step explanation:

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Answer:

\(Expected = 0.09375\)

Step-by-step explanation:

Given

\(Balls = 4\)

\(n = 4\) --- selection

Required

The expected distinct colored balls

The probability of selecting one of the 4 balls is:

\(P = \frac{1}{4}\)

The probability of selecting different balls in each selection is:

\(Pr = (\frac{1}{4})^n\)

Substitute 4 for n

\(Pr = (\frac{1}{4})^4\)

\(Pr = \frac{1}{256}\)

The number of arrangement of the 4 balls is:

\(Arrangement = 4!\)

So, we have:

\(Arrangement = 4*3*2*1\)

\(Arrangement = 24\)

The expected number of distinct color is:

\(Expected = Arrangement * Pr\)

\(Expected = 24 * \frac{1}{256}\)

\(Expected = \frac{3}{32}\)

\(Expected = 0.09375\)

Answer:

d

Step-by-step explanation:

Answer:

(-4,4) (3,-4) is the answer

Step-by-step explanation:

It would take Jimbo 24 minutes to solve a 3-variable substitution problem alone.

Let's assume that Jimbo takes x minutes to solve a 3-variable substitution problem alone.

We know that Jimmy takes 8 minutes to solve the same problem alone, so his work rate is 1/8 of the problem solved per minute.

Together, Jimbo and Jim Bob can solve the same problem in 6 minutes. This means that their combined work rate is 1/6 of the problem solved per minute.

We can set up the following equation to represent the work rates:

1/8 + 1/x = 1/6

To solve for x, we can multiply both sides of the equation by 24x:

3x + 24 = 4x

x = 24

Therefore, it would take Jimbo 24 minutes to solve a 3-variable substitution problem alone.

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Answer:

(a+b)^2 = a^2 + 2ab + b^2

(a-b)^2 = a^2 - 2ab + b^2

(a-b)(a+b) = a^2 - b^2

Step-by-step explanation:

Answer:

-2

Step-by-step explanation:

Three times the sum of a number and ten is twenty-four.​

3 x (n + 10) = 24

24 / 3 = 8

n + 10 = 8

-2 + 10 = 8

3 x (-2 + 10) = 24

3 x 8 = 24

Answer:

\( - 2\)

Step-by-step explanation:

do the math

Given that cauchy implies convergent, convergent implies cauchy, and that cauchy implies bounded, does bounded imply cauchy.

Bounded does not imply cauchy because there are a lot of examples of bounded sequences that aren't cauchy. Here is an example of a bounded sequence that is not cauchy :
Let's consider the sequence a(n) = (–1)^n.

It's a bounded sequence, with |a(n)| ≤ 1 for all n ∈ N.

However, it is not a Cauchy sequence because |a(n+1) - a(n)| = 2 for all n ∈ N.

Since the difference between consecutive terms in the sequence is always 2, and 2 is not a small number.

Therefore, we cannot find an N such that

|a(n+1) - a(n)| < ε

for all n ≥ N and ε > 0, which is a contradiction.

Therefore, the sequence is not Cauchy.

Thus, boundedness does not imply cauchy.

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Answer:

x = − 19

Hope it helps

Please mark me as the brainliest

Thank you

Answer:

im assuming this is a solve for x so uhm x = a              x = b

Step-by-sitep explanation:

Out of the three given series, only series I (3n) diverges, while series II (18 + 18^2 + 18^3 + ...) and series III (n!) also diverge. None of the given series are convergent.

Let's analyze each series to determine their convergence.

I. The series \(3n\) does not converge because it grows without bound as \(n\) increases. The terms of the series \(3n\) become larger and larger without approaching a specific value, indicating that the series diverges.

II. The series \(18 + 18^2 + 18^3 + \ldots\) is a geometric series with a common ratio of \(18\). For a geometric series to converge, the absolute value of the common ratio must be less than 1. In this case, \(|18|\) is greater than 1, so the series diverges.

III. The series \(n!\) represents the factorial of \(n\), which is the product of all positive integers from 1 to \(n\). The factorial function grows very rapidly, so the terms of the series \(n!\) become larger and larger as \(n\) increases. Therefore, the series \(n!\) diverges.

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Answer:

The answer is 13.2

Answer:

A quarter past 9 or 9:15

Step-by-step explanation:

PLZ MARK BRAINLIEST

Answer:

10:20am

Step-by-step explanation:

My teacher siad lol

There were 4.5 pounds of walnuts in the mixture. To find the number of pounds of walnuts in the mixture, we need to determine the weight of the walnuts based on the given ratio.

Let's assign variables to the different types of nuts. Let P represent the weight of pecans, W represent the weight of walnuts, and C represents the weight of cashews.

According to the given ratio, the weight of pecans, walnuts, and cashews can be expressed as 2x, 3x, and x, respectively, where x is a common factor.

Since Sharon bought a total of 9 pounds of nuts, we can set up the equation: 2x + 3x + x = 9.

Combining like terms, we get 6x = 9.

Dividing both sides of the equation by 6, we find that x = 1.5.

Now, we can determine the weight of the walnuts by substituting x back into the equation. 3x = 3 * 1.5 = 4.5 pounds.

Therefore, there were 4.5 pounds of walnuts in the mixture.

In summary, there were 4.5 pounds of walnuts in the mixture of nuts.

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Cody deposited approximately $364.54 every month in his savings account.

To calculate the monthly deposit amount, we can use the formula for the future value of an ordinary annuity:

FV = P * ((1 + r)ⁿ - 1) / r

Where:

FV is the future value (the final amount in the savings account)

P is the payment amount (monthly deposit)

r is the interest rate per period (3.69% per annum compounded monthly)

n is the number of periods (27 months)

We need to solve for P, so let's rearrange the formula:

P = FV * (r / ((1 + r)ⁿ - 1))

Substituting the given values, we have:

FV = $11,000

r = 3.69% per annum / 12 (compounded monthly)

n = 27

P = $11,000 * ((0.0369/12) / ((1 + (0.0369/12))²⁷ - 1))

Using a calculator, we find:

P ≈ $364.54

Therefore, Cody deposited approximately $364.54 every month in his savings account.

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The inequality which represents the given situation will be 2.25x + 2y ≤ 25.

A mathematical phrase in which the sides are not equal is referred to as being unequal. In essence, a comparison of any two values reveals whether one is less than, larger than, or equal to the value on the opposite side of the equation.

Suppose the cost of an apple is x and the cost of one mango is y.

2.25x + 2y = total cost

2.25x + 2y ≤ 25

Hence "The inequality which represents the given situation will be 2.25x + 2y ≤ 25".

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To fill in the observed values, we would need to know how many students from each category actually participated in the camel ride.

What is statistics?

Statistics is a branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of numerical data.

To calculate the expected values for each category, we first need to find out how many students we would expect to fall into each category if the selection was truly random. We can do this by multiplying the total number of students (150) by the percentage of students in each category. The results are as follows:

African American: 150 x 0.05 = 7.50

White: 150 x 0.48 = 72.00

Asian: 150 x 0.16 = 24.00

International: 150 x 0.23 = 34.50

Other: 150 x 0.08 = 12.00

These values represent the expected number of students in each category if the selection was truly random. We can now create a table to compare the expected and observed values:

Category                 Expected Observed

African American           7.50

White                         72.00

Asian                         24.00

International                 34.50

Other                         12.00

To fill in the observed values, we would need to know how many students from each category actually participated in the camel ride. Without this information, we cannot determine whether the null hypothesis is supported or rejected.

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Answer:

Step 1

-4 x -3 does not equal -12.