Lúcia is using energy at a rate of 420420420 kilocalories (\text{kcal})(kcal)left parenthesis, k, c, a, l, right parenthesis per

Question

3 months ago

12

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?

Mathematics

2 answers:

AnnZ [12.3K] · Answer 1 · 2026-02-26T22:03:16+03:00

AnnZ [12.3K]3 months ago

7 0

<span>Lúcia consumes energy at a rate of 420 kcal/h.

To convert this to a per minute rate, we need to change the units:
420 kcal/h = 420 000 cal/h
1 h = 60 min
420 000 cal/h = 420 000 cal /(60 min) = 7 000 cal / min or 7 kcal/min</span>

Svet_ta [12.7K] · Answer 2 · 2026-02-26T22:06:39+03:00

Answer:

Lúcia expends energy at a rate of 7 kilocalories each minute.

Step-by-step explanation:

To determine the solution, we need to convert kilocalories per hour into kilocalories per minute.

We're aware that Lúcia uses energy at a rate of 420 kcal/hr. Therefore, since 1 hour is equivalent to 60 minutes, we can use this to derive the answer.

$x=420\frac{kcal}{hr} \times \frac{1hr}{60min} = 7\frac{kcal}{min}$

Thus, Lúcia is using energy at a rate of 7 kilocalories per minute.

Lúcia is using energy at a rate of 420420420 kilocalories (\text{kcal})(kcal)left parenthesis, k, c, a, l, right parenthesis per

Lúcia expends energy at a rate of 7 kilocalories each minute.

Solution Procedure

Derivation of Formulas