2 years ago

Find the surface area of composite figure. use 3.14 for π. round to the nearest tenth

Mathematics

1 answer:

777dan777 [17]2 years ago

3 0

Answer:

334 in^2.

Step-by-step explanation:

The surface area = area of the top prism + area of the bottom - 2 * area of the base of the top smaller prism

= 2(5*3 + 5*3 + 3*3) + 2(9*7 + 9*5 + 7*5) - 2* 3*5

= 2* 39 + 2*143 - 30

= 334

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Answer:

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Step-by-step explanation:

Data provided in the question:

For sample 1:

n₁ = 10

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Now,

The pooled variance is calculated using the formula,

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The correct answer is option (a) It will be closer to 30 than to 20

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