Doctors use the term maximum heart rate (MHR) when referring to the quantity found by

starting with 220 beats per minute and subtracting 1 beat per minute for each year of a

person’s age. Doctors recommend exercising 3 or 4 times each week for at least 20 minutes

with your heart rate increased from its resting heart rate (RHR) to its training heart rate

(THR), where THR = RHR + .65(MHR – RHR)

Which of the following is closest to the THR of a 43-year-old person whose RHR is 54 beats

per minute?

A197

B169

C162

D134

E80