The answer is C.
Tim reads 2 more times than Kelly(2x) and then you add 5 because Jim reads 5 more hours than Tim.
I would draw a line graph going from your staring time and fill level until your "pool" is full. Keep the time along the bottom and fill level along the side
I think this is your answer
64 * 0.25 = 16 dollars
So, 64 minus 16 will be 48 dollars!
48 Dollars
Measure 2 sides, then multiply them, and divide by 2.
