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3 years ago

alias's hair grows at a rate of about 1/2 inch per month. how many months will it take her hair to grow 8 inches?

Mathematics

2 answers:

Brut [27]3 years ago

5 0

Answer:

Step-by-step explanation:

So we know that one month = $\frac{1}{2}$ inch.

As a result, two months = 1 inch.

Double that.

4 months = 2 inches

8 months = 4 inches.

16 months = 8 inches.

It's always a 2:1 ratio.

~theLocoCoco

Vlad [161]3 years ago

3 0

Answer:

16 months to grow hair to 8 inches

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In analyzing the city and highway fuel efficiencies of many cars and trucks, the mean difference in fuel efficiencies for the 60

Olegator [25]

Answer:

$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

$7.38+1.96\frac{2.51}{\sqrt{601}}=7.58$

For this case the confidence interval is given by :

$7.18 \leq \mu \leq 7.58$

Step-by-step explanation:

Data provided

$\bar X=7.38$ represent the sample mean for the fuel efficiencies

$\mu$ population mean

s=2.51 represent the sample standard deviation

n=601 represent the sample size

Confidence interval

The formula for the confidence interval of the true mean is given by:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom for this case is given by:

$df=n-1=601-1=600$

The Confidence level for this case is 0.95 or 95%, and the significance level $\alpha=0.05$ and $\alpha/2 =0.025$ and the critical value is given by $t_{\alpha/2}=1.96$

Replcing into the formula for the confidence interval is given by:

$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

$7.38+1.96\frac{2.51}{\sqrt{601}}=7.58$

For this case the confidence interval is given by :

$7.18 \leq \mu \leq 7.58$

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3 years ago

Solve the quadratic equation numerically (using tables of x- and y- values). x squared + 5 x + 6 = 0 a. x = -3 or x = -2 c. x =

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Answer:

Step-by-step explanation:

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2 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

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