Question

Jenna works in an ice cream shop. When she starts her shift the tub of chocolate ice cream is 2/3 full. When she finishes her shift 6 1/2 h later, there is only 1/6 of the tub left. What was the average hourly change in tub fullness?

Answer 1

To find the average hourly change in tub fullness, subtract the amount left at the end from the amount at the start and divide by the number of hours.

Step-by-step explanation:

To find the average hourly change in tub fullness, we need to determine how much the tub is decreasing in fullness over the 6 1/2 hour shift.

First, let's find the difference in fullness between the start and end of the shift. We subtract 1/6 (the amount left at the end) from 2/3 (the amount at the start) to get 2/3 - 1/6 = 4/6 - 1/6 = 3/6 = 1/2.

Next, we need to find the change in fullness per hour. We divide the difference in fullness (1/2) by the number of hours (6 1/2) to get 1/2 ÷ 6 1/2 = 1/2 ÷ 13/2 = 1/2 × 2/13 = 1/13.

So, the average hourly change in tub fullness is 1/13.