Question

Caroline resting heart is 52 beats per minute (bpm). When she starts running her heart rate increases 1.25% each second until it reaches maximum heart rate of 175 bpm. Find her approximate heart rare after 30 seconds

Answer 1

75.48389

Explanation:

How do u guys not know this?!

52(1.0125)^30

Answer 2

Answer:74.55 beat per minute

Explanation:

Given

Heart beat is 52 beat per minute

i.e.
`B=(52)/(60)` beat per sec

If heart rate is increases 1.25 % each sec

suppose B is the heart beat at first second therefore heat beat at 2 nd second

`B_2=B+1.25 \% B`

`B_2=B(1+1.25 \% )`

For 3 rd sec

`B_3=B(1+1.25\%)+1.25\%B(1+1.25\%)`

`B_3=B(1+1.25\%)^2`

similarly for 3 sec

`B_(30)=B(1+1.25\%)^(29)`

`B_(30)=1.433B`

`B_(30)=1.242\ \text{beat per second }`

`B_(30)=74.55\ \text{beat per minute}`