Mathematics, 11.03.2020 22:04 rubesh7552
Medical researchers have determined that for exercise to be beneficial, a person’s desirable heart rate, R, in beats per minute, can be approximated by the formulas
for men,
where a represents the person’s age. If the desirable heart rate for a man is 135 beats per minute, how old is he?
a.
22.5 years old
b.
40 years old
c.
45 years old
d.
42.5 years old
It’s B
Answers: 3
Medical researchers have determined that for exercise to be beneficial, a person’s desirable heart r...
Mathematics, 24.01.2020 02:31
Social Studies, 24.01.2020 02:31
History, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31
Mathematics, 24.01.2020 02:31