To achieve the maximum benefit for the heart when exercising, the heart rate (in beats per minute) should be in the target heart rate zone. The lower limit of this zone is found by taking 70% of the difference between 220 and the age of the person. The upper limit is found by using 85% of the difference. Complete parts a through d. a. Find formulas for the upper and lower limits (U and L) as linear equations involving the age x. U= 187-0.85x (Use integers or decimals for any numbers in the equation. Do not factor.) L = 154-0.7x (Use integers or decimals for any numbers in the equation. Do not factor.) b. What is the target heart rate zone for a 40-year-old? For a 40-year-old person, the lower limit is 126 and the upper limit is 153 beats per minute. c. What is the target heart rate zone for a 60-year-old? For a 60-year-old person, the lower limit is 112 and the upper limit is 136 beats per minute. ... d. Two women in an aerobics class stop to take their pulse and find that they have the same pulse. One woman is 34 years older than the other and is working at the upper limit of her target heart rate zone. The younger woman is working at the lower limit of her target heart rate zone. What are the ages of the two women, and what is their pulse? years and that of older woman is approximately years. The age of the younger woman is approximately (Round to the nearest integers as needed.)
To achieve the maximum benefit for the heart when exercising, the heart rate (in beats per minute) should be in the target heart rate zone. The lower limit of this zone is found by taking 70% of the difference between 220 and the age of the person. The upper limit is found by using 85% of the difference. Complete parts a through d. a. Find formulas for the upper and lower limits (U and L) as linear equations involving the age x. U= 187-0.85x (Use integers or decimals for any numbers in the equation. Do not factor.) L = 154-0.7x (Use integers or decimals for any numbers in the equation. Do not factor.) b. What is the target heart rate zone for a 40-year-old? For a 40-year-old person, the lower limit is 126 and the upper limit is 153 beats per minute. c. What is the target heart rate zone for a 60-year-old? For a 60-year-old person, the lower limit is 112 and the upper limit is 136 beats per minute. ... d. Two women in an aerobics class stop to take their pulse and find that they have the same pulse. One woman is 34 years older than the other and is working at the upper limit of her target heart rate zone. The younger woman is working at the lower limit of her target heart rate zone. What are the ages of the two women, and what is their pulse? years and that of older woman is approximately years. The age of the younger woman is approximately (Round to the nearest integers as needed.)
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Transcribed Image Text:To achieve the maximum benefit for the heart when exercising, the heart rate (in beats per minute) should be in the target heart rate zone. The lower limit of this zone is found by taking 70% of the
difference between 220 and the age of the person. The upper limit found by using 85% of the difference. Complete parts a through d.
a. Find formulas for the upper and lower limits (U and L) as linear equations involving the age x.
U= 187-0.85x (Use integers or decimals for any numbers in the equation. Do not factor.)
L = 154-0.7x (Use integers or decimals for any numbers in the equation. Do not factor.)
b. What is the target heart rate zone for a 40-year-old?
For a 40-year-old person, the lower limit is 126 and the upper limit is 153 beats per minute.
c. What is the target heart rate zone for a 60-year-old?
For a 60-year-old person, the lower limit is 112 and the upper limit is 136 beats per minute.
d. Two women in an aerobics class stop to take their pulse and find that they have the same pulse. One woman is 34 years older than the other and is working at the upper limit of her target heart
rate zone. The younger woman is working at the lower limit of her target heart rate zone. What are the ages of the two women, and what is their pulse?
years.
The age of the younger woman is approximately years and that of older woman is approximately
(Round to the nearest integers as needed.)
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