Question

An advertisement claims that a 5-pound box of detergent will wash 20 loads of laundry. A 5-pound box costs $3.50. A 15-pound box costs $10.00. About how much will you save per load if you buy the 15-pound box?
A.
0.8 cent
B.
8.3 cents
C.
16.7 cents
D.
17.5 cents