Rochelle's homework always consists of worksheets.last night,the average amount of time she needed to complete each worksheet was 15 minutes.how much time did Rochelle spend completing worksheets last night?

Answer:
t=15w
Step-by-step explanation:
t = 15*w or 15 times the number of worksheets.
Since they didn't specify the number of worksheets you won't be able to give a numerical answer.