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23 December, 13:49

Lúcia is using energy at a rate of 420420420 kilocalories (/text{kcal}) (kcal) left parenthesis, k, c, a, l, right parenthesis per hour (/text{h}) (h) left parenthesis, h, right parenthesis ice skating.

At what rate is Lúcia using energy in calories per minute / left (/dfrac{/text{cal}}{/text{min}}/right) (

min

cal

) left parenthesis, start fraction, c, a, l, divided by, m, i, n, end fraction, right parenthesis?

+3
Answers (1)
  1. 23 December, 17:43
    0
    Lúcia is using energy at a rate of 420 kcal/h.

    To find out the rate per minute we need to transform number:

    420 kcal/h = 420 000 cal/h

    1h = 60 min

    420 000 cal/h = 420 000 cal / (60min) = 7 000 cal / min or 7kcal/min
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