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lisov135 [29]
3 years ago
12

Heart beats 2,320 times during 20 minutes of rowing. While resting the heart is beating 16 times in 15 seconds. What is the diff

erence between the heart rate when it is rowing versus resting?
Mathematics
2 answers:
Mrac [35]3 years ago
6 0

Answer: 0.87 times per second  (Or 52.2 times per minute)

Step-by-step explanation:

You need to make the conversion from minutes to seconds.

Remember that 1 minute has 60 seconds. Then 20 minutes to seconds is:

(20minutes)(\frac{60seconds}{1minute})=1,200seconds

Find the number of times the heart beats in 1 second when it is rowing:

x_1=\frac{(2,320times)}{1,200seconds}=1.93\ times\ per\ second

Find the number of times the heart beats in 1 second when it is resting:

x_2=\frac{(16times)}{15seconds}=1.06\ times\ per\ second

Then the difference is:

difference=(1.93-1.06)\ times\ per\ second\\difference=0.87\ times\ per\ second

(Or 52.2 times per minute)

Debora [2.8K]3 years ago
5 0

<u>Answer:</u>

0.87 beats per second

<u>Step-by-step explanation:</u>

We are given that the heart beats 2,320 times during 20 minutes of rowing.

So heart rate while rowing = \frac{2320}{20 \times 60} =\frac{2320}{1200} = 1.93 beats / second

And while resting, the heart beats 16 times in 15 seconds.

So heart rate while resting = \frac{16}{15} = 1.07 beats / second

Therefore, the difference between the two hearts rates = 1.93-1.07 = 0.87 beats per second

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