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3 years ago

Someone please help me!!!

Mathematics

1 answer:

stiks02 [169]3 years ago

7 0

Answer: Answer is B

Step-by-step explanation:

Remeber that the shorter a container is doesn't mean it has less mass or volume. the width can mean it holds more. If the radius is twice as big that can mean the contents is more and your getting a better deal. hOpe this will help.

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Of 15 problems on a test, 13 were correct. What percent were correct?

grandymaker [24]

Use long division to divide 13/15.
This will give you 0.8666... (repeating)
Multiply by 100 to get your percent.
$\boxed{86.\overline6\%}$

8 0

3 years ago

At a rugby match the ratio of children to adults is 2:3 .There are 80 children in the crowd .How many adults are in the crowd?

NemiM [27]

Answer:

120

Step-by-step explanation:

80 represents the 2

Do 80 / 2 to get one 80 /2 = 40

So 1 would equal 40

Do 40 * 3 = 120 to get the three which represents the number of adults

7 0

3 years ago

Read 2 more answers

Given the function ƒ(x) = 5x2 − 9x + 18, find ƒ(3).

Crank

Answer:

f(3) = 36

Step-by-step explanation:

ƒ(x) = 5x^2 − 9x + 18

Let x =3

ƒ(3) = 5(3)^2 − 9(3) + 18

= 5*9 -27 +18

= 45 -27+18

=36

6 0

3 years ago

How can you tell when an equation in one variable has infinitely many solutions or no solution?

Masteriza [31]

Answer:

A system has infinitely many solutions when it is consistent and the number of variables is more than the number of nonzero rows in the rref of the matrix. For example if the rref is ��has solution set (4-3z, 5+2z, z) where z can be any real number.

6 0

3 years ago

An insurance company states that it settles 85% of all life insurance claims within 30 days. A consumer group asks the state ins

BlackZzzverrR [31]

Using the z-distribution, it is found that since the p-value of the test is less than 0.05, we reject the null hypothesis and find that there is enough evidence to conclude that the true proportion of all life insurance claims made to this company that are settled within 30 days is less than 85%.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if there is not enough evidence that the proportion is below 85%, that is:

$H_0: p \geq 0.85$

At the alternative hypothesis, it is tested if there is enough evidence that the proportion is below 85%, that is:

$H_0: p < 0.85$

<h3>What is the test statistic?</h3>

The test statistic is given by:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

In which:

$\overline{p}$ is the sample proportion.

p is the proportion tested at the null hypothesis.

n is the sample size.

For this problem, the parameters are:

$p = 0.85, n = 250, \overline{p} = \frac{203}{250} = 0.812$

Hence the test statistic is:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

$z = \frac{0.812 - 0.85}{\sqrt{\frac{0.85(0.15)}{250}}}$

z = -1.68

<h3>What is the p-value and the conclusion</h3>

Using a z-distribution calculator, with a left-tailed test, as we are testing if the proportion is less than a value, and z = -1.68, the p-value is of 0.0465.

Since the p-value of the test is less than 0.05, we reject the null hypothesis and find that there is enough evidence to conclude that the true proportion of all life insurance claims made to this company that are settled within 30 days is less than 85%.

More can be learned about the z-distribution at brainly.com/question/16313918

#SPJ1

4 0

2 years ago