Answer:
6 different sized paving stones,$16
Complete question:
What if the 360 cubic-inch paving stones are 4 inches thick and any whole number length and width are possible? How many different paving stones could be made? Suppose that the cost of having stone is $2.50, plus $0.15 for every 4 cubic inches of concrete how much would each paving stone cost?
Explanation:
V= B x h
B= V / h=> 360 / 4
B= 90 sq inch
Considering the factors of 90: 1,2,3,5,6,9,10,15,18,30,45,90
Now, make table with base height and volume for each pair of factors. (see figure in the attachment)
We'll have 6 different sized paving stones.
As each stone has a vol of 360 inches³. Diving by 4 in order to find how many 4 inch³ per stone
Concrete=$0.15 x (360/4) => $0.15 x 90
Concrete= $13.5
The cost of the stone plus the concrete will be:
cost= $2.50 + concrete
cost= $2.50 + $13.5
cost=$16