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

Question

Answer:

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

solved

general 11 months ago 8928