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20 January, 21:40

Mary's heart beats 68 times a minutes. At this rate, how many times does her heart beat in 45 minutes

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  1. 20 January, 22:34
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    3060

    Step-by-step explanation:

    If the ratio is 68 beats: every minute

    68:1

    Then in 45 minutes you'd have to multiply 68 beats for 45 minutes

    68 x 45 = 3060
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