Which statements about a square are always true?

Mathematics

1 answer:

Ulleksa [173]3 years ago

5 0

It has 4 congruent sides.
All 4 angles are 90°.
Its diagonals are congruent.

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4 15/16+7 3/4 simplest form

katen-ka-za [31]

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3 years ago

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A polling company is trying to estimate the percentage of adults that consider themselves happy. A confidence interval based on

Digiron [165]

Answer:

They should interview 1620 adults now.

Step-by-step explanation:

Margin of error of a confidence interval:

The margin of error of a confidence interval has the following format:

$M = z\frac{\sigma}{\sqrt{n}}$

In which z is related to the confidence level, $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this question:

z wont change, neither will $\sigma$

We want to increase n as such the margin of error is reduced to one third.

We have that the margin of error is inversely proportional to the square root of the size of the sample, which means that for the margin of error to be reduced to one third, the sample size has to be multiplied by $3^2 = 9$ . So

180*9 = 1620

They should interview 1620 adults now.

6 0

3 years ago

Graph the data set <br> {(-1,0.5),(0,1)(1,2)(3,8)(5,32)} Which kind of model best describes the data

bixtya [17]

Answer:

An exponential model can best describe the data

Step-by-step explanation:

The graph of the data set is shown in the attachment below. An exponential model can best describe the data. The respective equation can also be found in the graph