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OpenStudy (rebeccapink6398):
What is the area of this circle? (Express your answer using π.) A. A = 25π ft2 B. A = 5π ft2 C. A = 100π ft2 D. A = 10π ft2
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OpenStudy (rebeccapink6398):
|dw:1396319413650:dw|
OpenStudy (rebeccapink6398):
@jim_thompson5910
jimthompson5910 (jim_thompson5910):
10 is the diameter right?
jimthompson5910 (jim_thompson5910):
it looks it, if so, then the radius is 10/2 = 5 so r = 5
jimthompson5910 (jim_thompson5910):
Plug r = 5 into A = pi*r^2 and tell me what you get
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OpenStudy (rebeccapink6398):
78.5??
OpenStudy (rebeccapink6398):
@jim_thompson5910 ???
OpenStudy (rebeccapink6398):
hello???? are you there @jim_thompson5910 ??
jimthompson5910 (jim_thompson5910):
leave pi as it is
jimthompson5910 (jim_thompson5910):
so 5^2 = 25 making the answer to be 25pi
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