Answer:
I am unable to solve this problem Sorry
Step-by-step explanation:
About 30
I Multiply 3 to 35 then subtracted 15
21-13=8 and 29-21=8
So this is aritmetic series where a₁ = 13, and r = 8
Sum of the first n terms:
the answer is 200 mph because you take and divide the 400 miles by 20 mph