SOLUTION: A semicircular window of radius 10 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

Algebra ->  Square-cubic-other-roots -> SOLUTION: A semicircular window of radius 10 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      Log On


   

Question 264304: A semicircular window of radius 10 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 п = 3.14. Hint: Area of Circle: A = пr2)
How do I write the equation on questions like these? totally lost
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
A=1/2(3.14)(10)^2
A=157 sq in
157*.85=$133.45