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OpenStudy (anonymous):
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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OpenStudy (anonymous):
i was thinking about this just this morning!
OpenStudy (anonymous):
do you know the answer?
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