prealgebra
posted by cortney .
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 220a approximates a person's maximum heart rate in beats per minute, where a is the person's age.find the maximum heart rate

What is the person's age?
Respond to this Question
Similar Questions

algebra
In order to achieve maximum results from aerobic exercises, one should maintain ones heart rate at a certain level. A 45 year old women with resting heart rate of 70 beats per minute should keep her heart rate between 135 and 154 beats … 
algebra
in order to achieve maximum results from aerobic exercise should maintain one's heart rat at a certain level. a 30 year oldwoman with a resting heart rate of 65beats per minute, should keep her heart rate between 140 and 165 beats … 
math
in order to achieve from aerobic exercise, one should maintain one's heart rate at a certain level. A fourty year old women with a reating heart beat of 80 beats per minue should keep her heart rate between 140 and 160 beats per minute … 
Algebra
Target Heart Rate (Refer to the preceding exercise.) A target heart rate T that is half a person’s maximum heart rate is given by T=1101/2A, where A is a person’s age. (a) What is T for a person 30 years old? 
algebra
A person’s maximum heart rate is the highest rate, in beats per minute, that the person’s heart should reach. A person’s age added to his or her maximum heart rate is 220. Write and solve an equation to find the maximum heart … 
health
i was completing my study guide so i can study and i ran across these questions and needed help? 
7 th Math
During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula, M = 176 – 0.8A, where M is the maximum heart rate and A is the person’s age. Solve the formula for A. At what age would you have … 
Math
During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula M=1760.8A, where M is the maximum heart rate and A is the person’s age. Approximately, at what age would you have a recommended heart … 
Math check my answer
During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula M = 176 – 0.8A, where M is the maximum heart rate and A is the person’s age. Approximately, at what age would you have a recommended … 
Math
During exercise, the recommended maximum heart rate in beats per minute is modeled by the formula M=1760.8A, where M is the maximum heart rate and A is the person’s age. Approximately, at what age would you have a recommended heart …