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2 years ago

Please help me with this question

Mathematics

2 answers:

N76 [4]2 years ago

5 0

Answer:

Step-by-step explanation:

Iteru [2.4K]2 years ago

5 0

Answer:

Step-by-step explanation:

You only need to read as far as ...

y ≤

to choose the correct graph. The values in the solution will be less than or equal to those on the boundary line. That means the graph will be shaded below the line, and the line will be solid (because it is part of the solution).

The graph with a solid line and shading below is graph F.

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On Saturday at 9:00 p.m., the temperature in New York City was -6 degrees Fahrenheit.

stellarik [79]

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Step-by-step explanation:

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3 years ago

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algol [13]

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2 years ago

Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval for a

Vikki [24]

Answer:

$0.81 - 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.730$

$0.81 + 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.890$

And the confidence interval would be:

$0.730 \leq \p \leq 0.890$

Step-by-step explanation:

Information given:

$n=131$ represent the sample size

$\hat p=0.81$ represent the estimated proportion

The confidence interval would be given by this formula

$\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

For the 98% confidence interval the value of $\alpha=1-0.98=0.02$ and $\alpha/2=0.01$ , with that value we can find the quantile required for the interval in the normal standard distribution.

$z_{\alpha/2}=2.326$

And replacing into the confidence interval formula we got:

$0.81 - 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.730$

$0.81 + 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.890$

And the confidence interval would be:

$0.730 \leq \p \leq 0.890$

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4 years ago

2) The length of a step is 12 inches. In order to comply with safety regulations, the angle of elevation must be 60 degrees. Wha

Papessa [141]

12√3 / 12

Step-by-step explanation:

this creates a 30,60,90 triangle and since we are trying to find the rising part of the run we are going to have to find the 60-degree angle part. So then we do 12 times root 3.

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2 years ago

Simplify the equation Tell whether the equation has one, no, or infinite solutions.

givi [52]

The correct answer is C. One solution

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3 years ago

Please help me with this question​

Please help me with this question