SOLUTION: cost of gravel a gravel dealer charges $50 plus $30 per cubic yard for delivering a truckload of gravel. Express the total cost C(n) in dollars as a function of the number of cubic

Question 80526: cost of gravel a gravel dealer charges $50 plus $30 per cubic yard for delivering a truckload of gravel. Express the total cost C(n) in dollars as a function of the number of cubic yards delivered n. Find C(12).

Answer by bucky(2189) (Show Source): You can put this solution on YOUR website!
Call n the number of cubic yards that are ordered. Then to find the cost of just the gravel
you need to multiply the number of cubic yards (n) by $30 per yard. Therefore, that cost
is . To that cost the dealer will add $50 for delivery. This will make the total
cost of gravel plus delivery [call it C(n)]:
.
dollars.
.
This is one of the answers you were asked for in the problem.
.
Using this equation you can calculate the the cost of 12 delivered cubic yards by replacing
n with 12. This results in:
.

.
Multiply 30 by 12 and the equation becomes:
.

.
So 12 cubic yards of delivered gravel costs $410.
.
Hope this helps you to understand the problem a little more.
.
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