A strip of wood 78 inches long is to be cut into pieces 3 3/4 inches long. How many pieces can be cut?
1 answer:
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Area of a semicircle = 
r² / 2
r= 5/2 = 2.5
So: A= 3.14 x 2.5² / 2 A = 9.8125 so rounding to the nearest hundredth is A=9.81
r= 5/2 = 2.5
So: A= 3.14 x 2.5² / 2 A = 9.8125 so rounding to the nearest hundredth is A=9.81
The fractions already have a common denominator of x-8, so all wee need to do is combine the numerators: