Question

the maximum heart rate, in beats per minute, that you should achieve during exercise is 220 minus your age, 220 - a. your exercise goal is to improve cardiovascular conditioning. use the following formulas to answer parts (a) and (b). lower limit of range h = \frac{7}{10}(220 - a) upper limit of range h = \frac{4}{5}(220 - a) a. what is the lower limit of the heart range, in beats per minute, for a 49 - year - old with this exercise goal? the lower limit of the heart range is beats per minute. (round to the nearest integer as needed.)

Explanation:

Step1: Substitute age value

Substitute $a = 49$ into the lower - limit formula $H=\frac{7}{10}(220 - a)$. So we get $H=\frac{7}{10}(220 - 49)$.

Step2: Calculate value inside parentheses

First, calculate $220−49 = 171$. Then the formula becomes $H=\frac{7}{10}\times171$.

Step3: Multiply and round

$H=\frac{7\times171}{10}=\frac{1197}{10}=119.7$. Rounding to the nearest integer, $H\approx120$.

Answer:

120