Answer:
-Joe can do 78 loads of laundry with this one box.
-He is paying $0.25 for each load that he washes.
Explanation:
To determine the number of loads of laundry that Joe can do with this one box, you have to divide the total amount of scoops in a box by the amount of scoops that each load of laundry uses:
195/2.5=78
This means that Joe can do 78 loads of laundry with this one box.
Now, to find the amount that he is paying for each load that he washes, you have to divide the cost of the box of detergent by the amount of loads of laundry you can do with one box:
19.99/78=0.25
According to this, he is paying $0.25 for each load that he washes.