Question

4. The recommended heart rate for weight management exercise and

improving cardio fitness, in beats per minute, depends on a person's age
and can be represented by the expression 0.7(220 - a).

Part A: What does the variable in the expression represent?

Part B: Rewrite the expression using the distributive property.

Part C: what is the recommended heart rate for a 20-year-old person?

Answer 1

Part A: a=Age

Part B:

0.7 by 220

0.7 by a

then subtract the products

Part C: 140bpm