SOLUTION: A semicircular window of radius 12 inches is to be laminated with a sunblock coating that costs $0.75 per square inch to apply. What is the total cost of coating the window, to the

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Question 192696: A semicircular window of radius 12 inches is to be laminated with a sunblock coating that costs $0.75 per square inch to apply. What is the total cost of coating the window, to the nearest cent?
(Use п = 3.14. Hint: Area of Circle: A = пrē)
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
full circle would be %28pi%29%2812%29%5E2=144%28pi%29=452.16sq in
:
since this is only 1/2 of the circle we have 452.16/2=226.08 sq in
:
at 75 cents per sq in
:
226.08(.75)=$169.56