Mitchell took out a loan for $1100 at a 19.2% APR, compounded monthly, to
buy a scanner. If he will make monthly payments of $71.50 to pay off the
loan, how many total payments will he have to make?

A. 16

B. 19

C. 18

D. 17

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?