SOLUTION: In order to achieve maximum results from aerobic exercise, one should maintain one's heart rat at a certain level. A 45 year old woman with a resting heart rate of 80 beats per mi

Algebra ->  Inequalities -> SOLUTION: In order to achieve maximum results from aerobic exercise, one should maintain one's heart rat at a certain level. A 45 year old woman with a resting heart rate of 80 beats per mi      Log On


   

Question 145962: In order to achieve maximum results from aerobic exercise, one should maintain one's heart rat at a certain level. A 45 year old woman with a resting heart rate of 80 beats per minute, should keep her heart rate between 137 and 156 beats per minute while exercising. She checks her pulse for 10 sec while exercising. What should the number of beats be?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Let x= number of beats per minute


Since the number of beats per minute (bpm) should be within 137 and 156 , this means that we have the given inequality


137%3C+x+%3C156


But since we only want to know the bpm in 10 seconds, we need to divide everything by 6 (since 60%2F6=10)


137%2F6%3C+x+%2F6%3C156%2F6


22.833%3C+x+%2F6%3C26 Simplify





So in 10 seconds, she should be between 23 and 26 bpm