Solve the problem.
-$$\text { The formula } \mathrm { H } = \frac { 3 } { 5 } ( 215 - \mathrm { a } ) \text { gives the heart rate in beats per minute of a person who is a years old. Find the }$$ heart rate of a person who is 17 years old. Round to the nearest whole number.
A) 95 beats per minute
B) 112 beats per minute
C) 383 beats per minute
D) 119 beats per minute

Question

Quizplus · Accepted Answer

The heart rate $H$ for a 17-year-old can be found by substituting $a = 17$ into the formula $H = \frac{3}{5}(215 - a)$. This gives $H = \frac{3}{5}(215 - 17) = \frac{3}{5}(198) = 118.8$, which rounds to 119 beats per minute.

Solve the Problem Heart Rate of a Person Who Is 17 Years Old