The target heart rate for moderate exercise is [math] to [math] of maximum heart rate. We can use the expression [math] to represent a person’s target heart rate when their target rate is [math] of their maximum heart rate, and they are [math] years old.
Determine the target heart rate at the [math] level for moderate exercise for someone who is [math] years old.
At the [math] level, the target heart rate for moderate exercise for someone who is [math] years old is beats per minute.