170? I think. I don't really understand your question
Notice, you've got a diameter in inches
and a linear velocity in miles
thus, you'd need to convert first

now, whatever that is, you'll need to divide it by a revolution, recall, a revolution is

thus
Answer:
m∠2= 86
Step-by-step explanation:
since they are vertical angles, that means they are both equal to eachother.
so lets set them equal!
17x+1=20x-14
17x+15=20x
15=3x
x=5
now input x into m∠2
m∠2 = 20(5) – 14 = 86