SOLUTION: Could you please help me solve this word problem. A semicircular window of radius 15 inches is to be laminated with a sunblock coating that costs $.85 per square inch to apply w

Question 112332: Could you please help me solve this word problem.
A semicircular window of radius 15 inches is to be laminated with a sunblock coating that costs $.85 per square inch to apply what is the total cost of coating the window, to the nearest cent?
I think this is the equation, could you let me know if this is correct: A = 3.14(15)^2
Thanks, Jessie.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
The equation represents the area of the whole circle. We only want half of the circle. So divide the total area by 2 to get

Start with the given equation

Square 15 to get 225

Multiply 3.14 and 225 to get 706.5

Divide

So the area of the semicircular window is 353.25 sq in

Now multiply 353.25 by 0.85 to find out how much it will cost to coat the window

So it will cost around $300.26 to coat the window
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