Question

C. Example 8 in Section 3.2 describes fuel cost involved in idling your car engine for 5 minutes per day when the cost of gasoline is $3.75 per gallon using the formula   c = 19a – 4   where c is the cost and a is the size of the engine in liters. Determine the size of the engine in your car and find the cost of idling your car engine for 5 minutes per day

Answer 1

3.75=19a-4
3.75+4=19a
7.75/19=a
a=0.40