Answer:
I think the answer is A, 70 square centimeters
Binomial theorem:

The

term corresponds with the term in the sum for which

. For this

, we get

So the coefficient you want to find is
To solve add the ratio together and you get 10. 25/10 = 2.5
Now 2*2.5: 3*2.5: 5*2.5
= 5 : 7.5 : 12.5
Angle EBD and Angle DBE are adjacent
Ron would need to run 3 miles