Answer:
4.85
Step-by-step explanation:
Let's plug in the values for the equation! Let's start off with mike.
y = 4.5 + 0.977(172)
= 4.5 + 168.05
~ 172.55 = Mike arm span
Now let's do George
y = 4.5 + 0.977(165)
= 4.5 + 161.2
~ 165.7 = Mike arm span
172.55 - 165.7 ~ 4.85
*Note I also rounded in the middle