SOLUTION: 1. The driveway in front of my house is 20 feet wide and 100 feet long. If asphalt is ordered in a whole number of cubic yards, how many cubic yards of asphalt must be ordered t

Question 935832: 1. The driveway in front of my house is 20 feet wide and 100 feet
long. If asphalt is ordered in a whole number of cubic yards, how
many cubic yards of asphalt must be ordered to pave my driveway
with a layer of asphalt three inches thick?
2. In Euclidville, 80% of the families live west of the freeway and the other 20% live east of the freeway. The mean annual income of the families living west of the freeway is $45,000, and the mean annual income of the families living east of the freeway is $40,000. What is the mean annual income for all the families in Euclidville?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
1. The driveway in front of my house is 20 feet wide and 100 feet
long.
If asphalt is ordered in a whole number of cubic yards, how many cubic yards of asphalt must be ordered to pave my driveway with a layer of asphalt three inches thick?
Find how many cu ft of asphalt required, 3" = 1/4 ft
100 * 20 * = 500 cu ft
Find how many cu yds, 1 cu yd = 27 cu ft
= 18.51 ~ 19 cu yds should be ordered
:
2. In Euclidville, 80% of the families live west of the freeway and the other 20% live east of the freeway.
The mean annual income of the families living west of the freeway is $45,000, and the mean annual income of the families living east of the freeway is $40,000.
What is the mean annual income for all the families in Euclidville?
The ratio of the two groups 8:2
av =
Av =
av = $44000 for the whole city
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