Answer: 92
Explanation:
Let's figure out how many shirts she folds per minute.
She folded 20 shirts in 5 minutes.
20/5 = 4
She folds shirts at a rate of 4 per minute.
7:15 - 7:38 is a 23 minute window. So, we take 23 (the time in minutes) and multiply it by 4 (the shirts folded per minute).
23 * 4 = 92 shirts folded