Answer:
123.9 ≈ 124 beats per minute
Step-by-step explanation:
Data and formula provided in the question:
Age = 43 years old
The Formula for lower limit of range is given as:
lower limit of range = [tex]\frac{7}{10}(220-\textup{Age})[/tex]
Thus, on substituting the respective values, we get
lower limit of range = [tex]\frac{7}{10}(220-43)[/tex]
or
Lower limit of range = 123.9 ≈ 124 beats per minute