Lúcia is using energy at a rate of 420 kilocalories (kcal) per hour (start text, h, end text,) ice skating. At what rate is Lúcia using energy in calories per minute left parenthesis, / frac cal / - end fraction, right parenthesis?

Answer: 7000 calories / minutes

Step-by-step explanation:

420 kilocalories / hour

To convert kilocalories / hour to calories / minutes

kilo means 1000 and 60 minutes is equivalent to 1 hour

therefore

= (420*1000 calories) / 60minutes

= (420000 / 60) calories/minutes

= 7000 calories / minutes