Question 548661: How many times does an adult's heart beat in 270 s?
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! According to this page, "For an adult, a normal resting heart rate ranges from 60 to 100 beats a minute"
So let's average the endpoints to get 80 beats per minute.
Now convert 270 seconds to minutes by dividing it by 60 to get 270/60 = 4.5 minutes
Finally, multiply that answer by 80 (our assumed average) to get 4.5*80 = 360
So this average adult with a heart rate of 80 beats per minute has his/her heart beat 360 times in 270 seconds
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