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To calculate the area of a circle, which formula should be used?

 

A. A= π⋅r3

B. A= π⋅d

C. A= 2π⋅r

D. A= π⋅r2

 

 

How much flooring, in square feet, is needed to cover the floor of the space shown? Enter the measurement only, not the unit.

 

A. 405

B. 630

C. 605

D. 450

 Apr 2, 2020
 #1
avatar+21015 
+1

The answer to the first question is  A  =  pi·r2; but, in the future, it would be a lot quicker and easier for you to check your textbook or "google" the question.

 

For the second queston: draw a vertical line dividing the picture into two rectangles: a 15 x 30 rectangle on the left and a 12 x 15 rectangle on the right. 

 

Find those two areas and add them together.

 Apr 2, 2020
 #2
avatar+1715 
0

It was D for the first one and the bottom one was B

macabresubwoofer  Apr 2, 2020

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