document.write( "Question 73616: I am having a real hard time with this word problem. Thanks.\r
\n" ); document.write( "\n" ); document.write( "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 = pr²) \n" ); document.write( "

Algebra.Com's Answer #52649 by joyofmath(189) $\"\"$ $\"About$

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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 $\"%281%2F2%29%2Ap%2Ar%5E2\"$ = $\"%281%2F2%29%2Ap%2A15%5E2\"$ = $\"%281%2F2%29%2Ap%2A225\"$ . Replace p with 3.14 and the area of the semicircle = $\"%28225%2F2%29%2A3.14\"$ = $\"112.5%2A3.14\"$ = 353.25 square inches. The cost per square inch = $0.85 so the total cost = $\"353.25%2A.85\"$ = $ $\"highlight%28300.26%29\"$ . \n" ); document.write( "

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