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3 years ago

A^2 + 2a^2 = b^2 solve for b

Mathematics

2 answers:

lesantik [10]3 years ago

7 0

Answer:

b=a √3

Step-by-step explanation:

Murljashka [212]3 years ago

5 0

B= root square everything —-> a^2+ 2a^2

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3 years ago

The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 year

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Answer:

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Step-by-step explanation:

information given

$\bar X=10.6$ represent the sample mean

$\sigma=4.1$ represent the population standard deviation

$n=45$ sample size

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

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We want to test if the true mean is less than 12, the system of hypothesis would be:

Null hypothesis: $\mu \geq 10$

Alternative hypothesis: $\mu < 10$

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

Replacing the info given we got:

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

$z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29$

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