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2 years ago

I need help with this math sheet

Mathematics

1 answer:

kondaur [170]2 years ago

5 0

Something wrong with the image? I can't see sheet

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What set of lengths forms a right triangle?

Leni [432]

The answer is C. 50 in, 48 in, 14 in

In a right triangle, a² + b² = c², where c is the longest side (hypotenuse), a and b are the other two sides.

14² + 48² = 196 + 2304 = 2500
50² = 2500

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3 years ago

A software developer wants to know how many new computer games people buy each year. Assume a previous study found the standard

Marrrta [24]

Answer:

The minimum sample size required to ensure that the estimate has an error of at most 0.14 at the 95% level of confidence is n=567.

Step-by-step explanation:

We have to calculate the minimum sample size n needed to have a margin of error below 0.14.

The critical value of z for a 95% confidence interval is z=1.96.

To do that, we use the margin of error formula in function of n:

$MOE=\dfrac{z\cdot \sigma}{\sqrt{n}}\\\\\\n=\left(\dfrac{z\cdot \sigma}{MOE}\right)^2=\left(\dfrac{1.96\cdot 1.7}{0.14}\right)^2=(23.8)^2=566.42\approx 567$

The minimum sample size to have this margin of error is n = 567.

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3 years ago

The length of the hypotenuse of a 30°-60°-90° triangle is 16. What is the perimeter?

Tresset [83]

Answer:

-126

Step-by-step explanation:

I used a calculator:3

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2 years ago

Abit is planning a birthday party for his grandfather. He bought a cake for \$18$18. He also wants to buy some balloons, which a

Temka [501]

Answer:

Step-by-step explanation: if he try to buy as many balloons as passible with the money he has it would be 3$

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3 years ago

Convert 89/10 into a mixed number

kompoz [17]

Answer:

8 9/10

Step-by-step explanation:

89 goes into 10 8 times.

8x10=80.

89-80=9

So the answer is 8 9/10

6 0

2 years ago

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