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3 years ago

If auto insurance cost $8.00 per $1,000 of coverage what is the cost to insure a car valued at 15,400?

2 answers:

6 0

If you would like to know what is the cost to insure a car valued at 15400, you can calculate this using the following steps:

$8 ... $1000
$x = ? ... $15400

8 * 15400 = 1000 * x /1000
x = 8 * 15400 / 1000
x = $123.2

The correct result would be $123.2.

denis-greek [22]3 years ago

5 0

$\frac{8}{1000} = \frac{x}{15400}\\\\x= \frac{8\times15400}{1000}=\\\\x=$123.2\\\\{\boxed{x=123.2}$

ANSWER: x = $123.2

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3 years ago

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Suppose the standard deviation of a normal population is known to be 3, and H0 asserts that the mean is equal to 12. A random sa

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Answer:

$z=\frac{12.95-12}{\frac{3}{\sqrt{36}}}=1.9$

$p_v =P(z>1.9)=0.0287$

If we compare the p value and the significance level given $\alpha=0.05$ we see that $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean is higher than 12 at 5% of signficance.

Step-by-step explanation:

Data given and notation

$\bar X=12.95$ represent the sample mean

$\sigma=3$ represent the population standard deviation for the sample

$n=36$ sample size

$\mu_o =12$ represent the value that we want to test

$\alpha=0.05$ represent the significance level for the hypothesis test.

z would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the mean is equal to 12, the system of hypothesis would be:

Null hypothesis: $\mu \leq 12$

Alternative hypothesis: $\mu > 12$

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$z=\frac{12.95-12}{\frac{3}{\sqrt{36}}}=1.9$

P-value

Since is a right tailed test the p value would be:

$p_v =P(z>1.9)=0.0287$

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3 years ago

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Answer:

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Step-by-step explanation:

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y= original width of garden

if she triples it she needs to multiply the old measurements by 3

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3 years ago

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jarptica [38.1K]

First, find slope of point A and B using slope formula:
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Answer:

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Step-by-step explanation:

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