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3 years ago

Why is 8.8 classified as a rational number?

1 answer:

4 0

A rational number can be expressed as the ratio of two integers.

$\frac{a}{b}$

Where a and b are integers and b is not equal to 0.

The rational number 8.8 can be expressed as two integers. Like $\frac{8.8}{1}$

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If Bob paid $41.44 for 14 gallons what is the price of gas per gallon

Dmitry [639]

$2.96 you divide 41.44 by 14

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3 years ago

Help me with my math please!!!!

astra-53 [7]

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3 years ago

X-3y=2 what is the slope

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4 years ago

The measure of an angle is 167°. What is the measure of its supplementary angle?

Anna007 [38]

Answer:

x=13

Step-by-step explanation:

Supplementary angles add to 180 degrees

x+167 = 180

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x+167-167= 180-167

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8 0

3 years ago

Read 2 more answers

Give a 98% confidence interval for one population mean, given asample of 28 data points with sample mean 30.0 and sample standar

klio [65]

We have a sample of 28 data points. The sample mean is 30.0 and the sample standard deviation is 2.40. The confidence level required is 98%. Then, we calculate α by:

$\begin{gathered} 1-\alpha=0.98 \\ \alpha=0.02 \end{gathered}$

The confidence interval for the population mean, given the sample mean μ and the sample standard deviation σ, can be calculated as:

$CI(\mu)=\lbrack x-Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}},x+Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}}\rbrack$

Where n is the sample size, and Z is the z-score for 1 - α/2. Using the known values:

$CI(\mu)=\lbrack30.0-Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}},30.0+Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}}\rbrack$

Where (from tables):

$Z_{0.99}=2.33$

Finally, the interval at 98% confidence level is:

$CI(\mu)=\lbrack28.94,31.06\rbrack$

4 0

1 year ago