Final answer:
Lydia spent approximately 1 minute more on each exercise yesterday than she did today, calculated by taking the average time spent per exercise on each day and then finding the difference. None of the given options are correct
Step-by-step explanation:
To find out how much more time Lydia spent on each exercise yesterday than today, we first calculate the time spent per exercise for both days. Yesterday, she spent 93 minutes on 15 exercises, so we divide 93 minutes by 15 to get the time spent per exercise:
Time per exercise (yesterday) = 93 minutes ÷ 15 = 6.2 minutes per exercise
Today, she spent 48 minutes on 9 exercises, so we divide 48 minutes by 9 to get the time spent per exercise:
Time per exercise (today) = 48 minutes ÷ 9 = 5.33 minutes per exercise
To find the difference in time spent per exercise between the two days, we subtract the lower time from the higher time:
Difference = 6.2 minutes - 5.33 minutes ≈ 0.87 minutes ≈ 1 minute
Thus, Lydia spent approximately 1 minute more on each exercise yesterday than she did today.
None of the given options are correct