Answer:
Time taken to fill 40-ounce cup, t = 0.2 x Volume of cup in ounce = 0.2 x 40 = 8 seconds
Explanation:
A soda machine takes 3 seconds to fill a 15-ounce cup.
Time taken to fill 15-ounce cup = 3 seconds

Now we need to find equation for t which is the time to fill a 40-ounce cup.

Time taken to fill 40-ounce cup, t = 0.2 x Volume of cup in ounce = 0.2 x 40 = 8 seconds