Question 190362: # 1. 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
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! # 1
Q: 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.
A:
First, let's find the area of the rectangular lawn. To make things easy on ourselves, we're going to round 60.4 to the nearest whole number to get 60. Also, let's round 80.2 to the nearest integer to get 80. Now multiply these two dimensions to get
So the area of the lawn is roughly 4,800 square feet
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Next, round the number of grubs per square foot to the nearest whole number to get 4 grubs per square foot. So if the lawn is only one square foot, then there will be about 4 grubs on the lawn. If the lawn is 2 square feet, then there are about 2*4=8 grubs on the lawn. Similarly, if the lawn is 3 square feet, then there are roughly 3*4=12 grubs on the lawn. This means that if the lawn is "x" square feet, then there are about  grubs on the lawn.
So this simply means that you multiply the area of the lawn by the number of grubs per square foot to get
So there are approximately 19,200 grubs on the lawn
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