Question

a gallon of latex paint can cover 500 square feet. maria has a rectangular room whose dimensions are 9 feet by 15 feet with 8 - foot ceilings. how many gallon - containers of paint does she need to buy to paint her room (not including the floor)? maria should buy gallon - containers of paint. (type a whole number.)

Explanation:

Answer:

First, find the area of the room to be painted. The area of the four - wall surfaces of a rectangular room needs to be calculated.
The two walls with dimensions \(9\) feet by \(8\) feet have a combined area of \(2\times(9\times8)=144\) square feet.
The two walls with dimensions \(15\) feet by \(8\) feet have a combined area of \(2\times(15\times8) = 240\) square feet.
The total area to be painted is \(144 + 240=384\) square feet.
Since one gallon of paint covers \(300\) square feet, the number of gallons of paint needed is \(\frac{384}{300}=1.28\). Since we can't buy a fraction of a gallon, we need to buy \(2\) gallons.
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