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31-08-2018
Biology

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When exercising, a person's pulse rate should not exceed a certain limit, which depends on his or her own age. this maximum rate is represented by the expression 0.8(220-a), where a is age in years. find the age of a person whose maximum pulse is 152?

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31-08-2018

The person is 30 years old! Here's how you solve it:

A = .8 (220-a)
152 = .8 (220-a)
152 = 176 - .8a
.8a = 24
a = 30

Hope this helps!

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