SOLUTION: I am having a real hard time with this word problem. Thanks. A semicircular window of radius 15 inches is to be laminated with a sunblock coating that costs $0.85 per square in

Question 73616: I am having a real hard time with this word problem. Thanks.
A semicircular window of radius 15 inches is to be laminated with a sunblock coating that costs $0.85 per square inch to apply. What is the total cost of coating the window, to the nearest cent? (Use p = 3.14. Hint: Area of Circle: A = pr�)
Answer by joyofmath(189) (Show Source): You can put this solution on YOUR website!
The area of the semicircular window is half of what the area would be if the window were a whole circle. The area is thus = = . Replace p with 3.14 and the area of the semicircle = = = 353.25 square inches. The cost per square inch = $0.85 so the total cost = = $.
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