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posted by  NaruHokage14 on 11/6/2009 1:48:50 AM  |  status: Live  |  Earned Karma: 35

5th grade math word problem, Book: , alabama edition

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Other 5th Grade Math, Book: Harcourt, Alabama Edition Lesson 6, pg259, problem 22 N/A 11/6/2009 at 6:00:00 AM
Question Details:
1. Tamar took her pulse for 20 seconds. She counted 29 heartbeats. How many
beats per minute is that?
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posted by Christina86 on 11/6/2009 3:06:33 AM  |  status: Live
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Response Details:
     1 minitue =60 seconds
                   =3(20) seconds
      number of  heartbeats in 20 sec is 29
    so the  number heartbeat in 1 min (3(20) sec)  is 3(29)=87
          heartbeat per minitue is 87.
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posted by Ogivol on 11/6/2009 3:09:55 AM  |  status: Live
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Response Details:
The problem can be done as follows:


Would leave you with a heartbeat measurement in heartbeats per second.
As the question asks for Heartbeats per minute, simply convert seconds to minutes as follows:

20 seconds / 60 seconds 
=1/3 minutes.

29 heartbeats / (1/3 minutes) = 29 heartbeats * 3 = 87 heartbeats per minute.
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posted by sportsfreak5510 on 11/6/2009 11:58:17 PM  |  status: Live
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To find the answer for this you need to find out how many times 20 seconds goes into 60 seconds.  To do this you need to divide 60 by 20, or 6020=3.  So you now know that 20 seconds goes into 60 seconds 3 times. Now that you know this you need to multiply 29 by 3 (29x3=your answer) to get your answer for how many beats per minute, for 29 beats in 20 seconds.
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posted by Sonny's on 11/7/2009 2:58:01 PM  |  status: Live
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Response Details:
Therefore there are 87 heart beats in 1 minute.
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