A 42" diameter table needs a tablecloth that hangs off the edge 8". What is the area of the tablecloth? Use 3.14 for π. A) 1,384.74 in 2 b) 2,640.74 in 2 c) 1,962.5 in 2 d) 182.12 in 2


3 Answers

Janey Profile
Janey answered
That's Answer A: 1384.74 ins
Mandy Clark Profile
Mandy Clark answered
The formula for are of a circle is pi*r2.  the diameter is all the way across the circle and the radius is halfway, so divide 42 by 2

3.14*212 = 441*3.14 ALWAYS do pi last because it'll screw you up otherwise

answer A:)
thanked the writer.
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John McCann
John McCann commented
Very good recovery! I was going to alert you to that, but you are good!
Mandy Clark
Mandy Clark commented
Hahaha my math teacher has taught me to be quick, but being quick has its penalties....and he always tells us that our fingers don't have brain cells lol:) so they can't tell me what i'm doing wrong!
John McCann
John McCann commented
Be precise. But, do not be tardy, or someone else will scoop you and win the Nobel prize that could have been yours!
John McCann Profile
John McCann answered
Draw your circle and add the extra 8'' all the way around and you will see that A can not be the answer.

I see that Mandy also figured that out.

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