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Trevor makes a scale drawing of a doghouse that he is building. The scale he uses is 1in : 0.4 ft. What is the actual area of the floor of the doghouse if the dimensions on the scale drawing are 8in. By 10in

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First, we get the real dimension of the floor by using the scale in our conversion.
                8 in x ( 0.4 ft / 1 in) = 3.2 ft
                10 in x (0.4 ft / 1 in) = 4 ft
We get the area of the floor by multiplying its dimensions such that,
                       Area of the floor = (3.2 ft)(4 ft) = 12.8 ft²
Thus, the actual area of the floor is equal to 12.8 ft².