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24 March, 17:23

While exercising Julie found that her heart was beating 12 times every five seconds how many times was it be eating per minute (60 seconds)

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  1. 24 March, 20:29
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    To find her heart rate per minute, set up a proportion.

    Let x represent the number of heart beats in a minute.

    12/5=x/60

    5x=720

    5/5x=720/5

    X=144

    Thus, her heart was beating at a rate of 144 beats per minute.
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