During exercise,the recommended maximum heart rate in beats per minute is modeled by the formula M=176-0.8A,where M is the maximum heart rate and A is the person's age.Approximately,at what age would you have recommended heart rate beast per minute of 135?
A.25 years
B.39 years
C.51 years
D.53 years what is the correct answer
We can solve for the age A by substituting M=135 in the given formula and solving for A:
M = 176 - 0.8A
135 = 176 - 0.8A
0.8A = 176 - 135
0.8A = 41
A = 41/0.8
A = 51.25
Therefore, the recommended heart rate of 135 beats per minute would be approximately at the age of 51 years.
The correct answer is C. 51 years.