Question
Calculate the Target Heart Rate for a 15 year old. (220-age) x .5 (220-age) x .85 Choose the correct answer. (5 points) Responses The Target Heart Rate for a 15 year old is 103 to 174 The Target Heart Rate for a 15 year old is 103 to 174 The Target Heart Rate for a 15 year old is 75 to 185
Answers
GPT-4o mini
To calculate the Target Heart Rate (THR) for a 15-year-old, we can use the formula that you provided.
1. First, calculate the maximum heart rate:
\[
220 - \text{age} = 220 - 15 = 205
\]
2. Next, calculate the lower end of the target heart rate range (50% of maximum heart rate):
\[
205 \times 0.5 = 102.5
\]
3. Then, calculate the upper end of the target heart rate range (85% of maximum heart rate):
\[
205 \times 0.85 = 174.25
\]
Thus, rounding to the nearest whole number, the target heart rate for a 15-year-old is approximately:
- Lower end: 103
- Upper end: 174
Therefore, the correct answer is:
**The Target Heart Rate for a 15 year old is 103 to 174.**
1. First, calculate the maximum heart rate:
\[
220 - \text{age} = 220 - 15 = 205
\]
2. Next, calculate the lower end of the target heart rate range (50% of maximum heart rate):
\[
205 \times 0.5 = 102.5
\]
3. Then, calculate the upper end of the target heart rate range (85% of maximum heart rate):
\[
205 \times 0.85 = 174.25
\]
Thus, rounding to the nearest whole number, the target heart rate for a 15-year-old is approximately:
- Lower end: 103
- Upper end: 174
Therefore, the correct answer is:
**The Target Heart Rate for a 15 year old is 103 to 174.**