please solve with working much appreciated

Option a: I = R+0.7H is the correct answer
Step-by-step explanation:
we will make the equation our self and then compare it with the given options
Given
heart rate goal = I
Heart rate reserve = H
Resting Heart Rate = R
Now it is mentioned that
70% of H is added to R to get I
So it can be written in the form of equation as:
[tex]I = R + \frac{70}{100}H\\\\I = R + 0.7H[/tex]
Hence,
Option a: I = R+0.7H is the correct answer
Keywords: Equation, modelling
Learn more about equations at:
#LearnwithBrainly