What is the circumference of the circle? Round your answer to the nearest foot.
A.88 ft
B.84 ft
C.66 ft
D.44 ft
Wait i'm putting the picture up right now:)
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OpenStudy (ashsmashum1290):
|dw:1428037661428:dw|
OpenStudy (jdoe0001):
Area of a circle = \(\large \bf 2\pi r\qquad r=radius=\frac{diameter}{2}\)
OpenStudy (ashsmashum1290):
okay so what do i do first?:/
Mehek (mehek14):
divide the diameter by. 2
OpenStudy (ashsmashum1290):
28/2=14
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Mehek (mehek14):
2*14?
OpenStudy (ashsmashum1290):
28?
Mehek (mehek14):
28*3.14
OpenStudy (ashsmashum1290):
84
Mehek (mehek14):
no try again
28 * 3.14
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OpenStudy (jdoe0001):
well.. what's the daimeter?
OpenStudy (ashsmashum1290):
87.92
Mehek (mehek14):
so now round 87.9
OpenStudy (ashsmashum1290):
um i don't know how to :(
Mehek (mehek14):
look at the number before the decimal place
if it is 5+ you will round the ones place one number up
if the number is 4-
it stays the same
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OpenStudy (jdoe0001):
87.9 is correct
rounding up means
if the decimal number is "below" 5, it rounds up to 87 flat
if the decimal number is "above" 5, it rounds up to 88 flat
OpenStudy (ashsmashum1290):
it becomes 87.10
OpenStudy (ashsmashum1290):
okay so 88
Mehek (mehek14):
yea
OpenStudy (jdoe0001):
yeap
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