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Maurinko [17]
3 years ago
5

Lúcia is using energy at a rate of 420 kilocalories (kcal) per hour (h) ice skating.

Mathematics
1 answer:
kakasveta [241]3 years ago
4 0

Answer:

7000 cal/min

Step-by-step explanation:

It is mentioned that, Lucia is using energy at a rate of 420 kilo calories per hour ice skating

We know that,

1 kilo calories = 1000 calories

Using unitary method :

420 kilo calories = 420,000 calories

Also,

1 hour = 60 minutes

In this case, Lucia is using energy per 60 minutes =  420,000 calories. So,energy used by her per minute is :

E=\frac{420000}{60} =7000 calories

Hence, Lucia is using 7000 calories per minute.

Credit to handgunmaine: https://brainly.in/question/13030745

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<h3>How to simplify the expression?</h3>

The mathematical expression is given as:

32/5 x 3(-7/5)

Evaluate the product of 3 and -7/5

32/5 x 3(-7/5) =  32/5 x -21/5

Evaluate the product of 32 and -21

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So, we have:

32/5 x 3(-7/5) =  -672/25

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t(n)=-2n+7

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substitute n = 1 in the sequence to determine the first term

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