Keisha rented a truck for one day there was a base fee of $8.25 and there was an additional charge of 9 cents for each mile driving the total cost c (in dollars) for driving x mile is giving by the following function see ( x = 0.09 x + 8.25) what is the total rental cost if keisha drove 15 miles?
To find the total rental cost for 15 miles, we need to substitute x = 15 into the given function.
x = 0.09x + 8.25
15 = 0.09(15) + 8.25
15 = 1.35 + 8.25
15 = 9.6
Therefore, the total rental cost for driving 15 miles is $9.60.