3. To achieve the maximum benefit for the heart when exercising, your heart rate (in beats per minute) should be in the target heart rate zone. The lower limit of this zone is found by 70% of the difference between 220 and limit is found by using 85%. your agex a. Find formulas for the upper and lower limits (u and l) as linear equa- tions involving the age x. b. What is the target heart rate zone for a 20-year-old? c. What is the target heart rate zone for a 40-year-old? d. Run for 10 minutes, take your pulse, and see if it is in your target The upper heart rate zone.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter4: Polynomial And Rational Functions
Section4.3: Zeros Of Polynomials
Problem 67E
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3. To achieve the maximum benefit for the heart when exercising, your
heart rate (in beats per minute) should be in the target heart rate zone. The
lower limit of this zone is found by 70% of the difference between 220 and
your agey The upper limit is found by using 85%.
a. Find formulas for the upper and lower limits (u and l) as linear equa-
tions involving the age x.
b. What is the target heart rate zone for a 20-year-old? i
c. What is the target heart rate zone for a 40-year-old?
d. Run for 10 minutes, take your pulse, and see if it is in your target
heart rate zone.
Transcribed Image Text:3. To achieve the maximum benefit for the heart when exercising, your heart rate (in beats per minute) should be in the target heart rate zone. The lower limit of this zone is found by 70% of the difference between 220 and your agey The upper limit is found by using 85%. a. Find formulas for the upper and lower limits (u and l) as linear equa- tions involving the age x. b. What is the target heart rate zone for a 20-year-old? i c. What is the target heart rate zone for a 40-year-old? d. Run for 10 minutes, take your pulse, and see if it is in your target heart rate zone.
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