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April 24, 2014

Homework Help: pre-algebra

Posted by cortney on Monday, August 15, 2011 at 10:50pm.

measuring your heart rate is one way to check the intensity of exercise. studies show that a person's maximum heart rate depends on his or her age. The expression 220-a approximates a person's maximum heart rate in beats per minute, where a is the person's age.find the maximum heart rate

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