Question

When a grizzly bear hibernates, its heart rate drops 10 beats per minute, which is 20% of its normal value. What is the grizzly bear's normal heart rate when it is not hibernating?

Answer 1

50 bpm

Explanation:

20% of a value is also 1/5 of a value.

Since the 10 bpm is 1/5 the normal value of the bear's heart rate, we just need to multiply 10 by 5 to get the normal heart rate:

10*5 = 50

Meaning that the bear's normal heart rate is 50 bpm.

Answer 2

50

Explanation:

Let's call the grizzly bear's normal heart rate x.

According to the problem, when the grizzly bear hibernates, its heart rate drops 10 beats per minute, which is 20% of its normal value. In other words, the amount that the heart rate drops is 20% of the normal heart rate.

We can set up an equation to represent this:

20% of x = 10

To solve for x, we can start by simplifying the left side of the equation. We can convert the percentage to a decimal by dividing by 100:

0.2x = 10

Then, we can isolate x by dividing both sides by 0.2:

x = 50

Therefore, the grizzly bear's normal heart rate when it is not hibernating is 50 beats per minute.