Answer: 9 1/3 minutes
First create an equation with the given information; with x being the commercial time, 30=3x+2, now solve for x. First subtract 2 from each side and get 28=3x and then divide each side by 3 to get 9 and 1/3 minutes.
The equation for the area of a circle is:

. Insert 9 as your radius (r) into the equation and solve:
\pi 9^2 = 254.469
$35.00 x .20 = $7
So the discount would be $7 off of $35, for a final sale price of $28
Answer:
It's not a real solution
Step-by-step explanation: