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2 years ago

10

What is the area of this figure? please help me ASAP!

2 answers:

Vilka [71]2 years ago

5 0

Area = 35

Area = area of square + area of triangle

Area of square = length x width
Area of square = 5 x 5
Area of square = 25

Area of triangle = base x height x 0.5
Area of triangle = 5 x 4 x 0.5
Area of triangle = 10

Area of figure = triangle area + square area

Area of figure = 10 + 25

Area = 35

adell [148]2 years ago

5 0

Answer:

35cm squared

Step-by-step explanation:

5*5=25 for the square

10cm for the triangle (multiply base by height)

add it for 35

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A researcher wants to estimate the percentage of all adults that have used the Internet to seek pre-purchase information in the

Lubov Fominskaja [6]

Answer:

The required sample size for the new study is 801.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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In which

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This means that $\pi = 0.25$

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So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

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This is n for which M = 0.03. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.96\sqrt{\frac{0.25*0.75)}{n}}$

$0.03\sqrt{n} = 1.96\sqrt{0.25*0.75}$

$\sqrt{n} = \frac{1.96\sqrt{0.25*0.75}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{0.25*0.75}}{0.03})^2$

$n = 800.3$

Rounding up:

The required sample size for the new study is 801.

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3 years ago

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goldfiish [28.3K]

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