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Dmitry [639]
3 years ago
7

Bob and Mark talk about their families. Bob says he has 3 kids, the product of their ages is 72. He gives another clue: the sum

of the ages of his children. Mark points out that there is still not enough information to accurately guess. Finally, Bob says, "My youngest child called Justice." Mark can then correctly determine the ages of Bob's children. What are the ages?
Mathematics
1 answer:
makvit [3.9K]3 years ago
4 0
The first clue to this problem is that Bob has three kids in which the product of their ages is 72 and the sum is 14. From the factor tree, there  are two combinations of the ages  2, 6, 6 and<span>  3,3,8. Last thing he said is that his youngest is named Justice. One combination has similar number in the set which means there are twins. The youngest means there can be only one child. Hence the ages of the children are 2,6,and 6. </span>        
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A university interested in tracking its honors program believes that the proportion of graduates with a GPA of 3.00 or below is
insens350 [35]

Answer:

The value of the test statistic and its associated p-value at the 5% significance level are -1.54 and 0.9382, respectively.

Step-by-step explanation:

A university interested in tracking its honors program believes that the proportion of graduates with a GPA of 3.00 or below is less than 0.16.

This means that the null hypothesis is:

H_{0}: p \geq 0.16

Testing this hypothesis, means that the alternate hypothesis is:

H_{a}: p > 0.16

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

0.16 is tested at the null hypothesis:

This means that \mu = 0.16, \sigma = \sqrt{0.16*0.84}

In a sample of 200 graduates, 24 students have a GPA of 3.00 or below.

This means that n = 200, X = \frac{24}{200} = 0.12

Value of the test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.12 - 0.16}{\frac{\sqrt{0.16*0.84}}{\sqrt{200}}}

z = -1.54

Pvalue:

The pvalue is the probability of finding a sample mean above 0.12, which is 1 subtracted by the pvalue of z = -1.54.

Looking at the z-table, z = -1.54 has a pvalue of 0.0618

1 - 0.0618 = 0.9382

The value of the test statistic and its associated p-value at the 5% significance level are -1.54 and 0.9382, respectively.

6 0
3 years ago
Evaluate the given algebraic expressions replacing x with -2 and y with 1<br><br>3x^2
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Answer:

12

Step-by-step explanation:

3x^2

because the information provided states that x = -2, that is what we are going to replace x with.

3(-2)^2

the next step is to evaluate the power because that is next in PEMDAS.

(-2)^2 = 4

that leaves us with:

3 * 4 = 12      ( the " * " represents the multiplication sign)

hope this helps!

3 0
1 year ago
How do I isolate the “I” variable
hjlf

Answer:

I = \pm \sqrt{\dfrac{P}{R}}

Step-by-step explanation:

P = I^2R

Divide both sides by R.

\dfrac{P}{R} = I^2

Switch sides.

I^2 = \dfrac{P}{R}

Take the square root of both sides.

I = \pm \sqrt{\dfrac{P}{R}}

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3 years ago
A rectangular prism is 4 cm long, 3 cm wide and 8 cm tall. What is the volume of the prism?
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Answer:

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Step-by-step explanation:

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8 0
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You plan to invest $1,210 a year for 7 years at a 9 percent annually? How much will you have in 7 years? Assume the first invest
erastova [34]

Answer:

See below

Step-by-step explanation:

For SIMPLE interest :

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For ANNUAL COMPOUNDING of interest

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<u />

I do not know which one you need....what are you studying presently?

4 0
2 years ago
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