SOLUTION: ryan ran out of paint while painting his house. the paint costs 5.65 per gallon. ryan still has to paint a section measuring 50 ft by 12 ft. one gallon of paint covers 15 square fe

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Question 896838: ryan ran out of paint while painting his house. the paint costs 5.65 per gallon. ryan still has to paint a section measuring 50 ft by 12 ft. one gallon of paint covers 15 square feet. how much will it cost ryan to finish painting the house?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
The unfinished section is 50*12 square feet;

Paint rate regarding usage is 1 gallon for 15 square feet.

50%2A12%2Aft%5E2%2A%281%2F15%29%28gallons%2F%28ft%5E3%29%29
%28%2850%2A12%29%2F15%29%2Agallons

but you want the cost to finish; so one more conversion.
%28%2850%2A12%29%2F15%29%2Agallons%2A5.65%28dollars%2Fgallon%29

You can compute that. I just kept most of the numbers with the resulting units so you see how this can work.