SOLUTION: Jane determines that her lawn contains an average of 3.8 grubs per square foot (ft2). If her rectangular lawn measures 60.4 ft by 80.2 ft, estimate the total number of grubs in he

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Question 189705: Jane determines that her lawn contains an average of 3.8 grubs per square foot (ft2). If her rectangular lawn measures 60.4 ft by 80.2 ft, estimate the total number of grubs in her lawn. Where do I or how do I start? Do I multiply 60.4 by 3.8 and then multiply 80.2 by 3.8 to get the answer?
Answer by josmiceli(9645) About Me  (Show Source):
You can put this solution on YOUR website!
Imagine a square 1 ft on each side and 3.8 grubs inside that square.
Then find the area of her lawn.
60.4%2A80.2+=+4844.1 ft2
Each of the 1 ft x 1 ft squares in her lawn has 3.8 grubs, so
3.8%2A4844.1+=+18407.5 grubs in her lawn
In terms of dimensions, it's
(grubs/ft2)(ft2/lawn) = grubs/lawn