No, there is not common ratio...
0.972 (common ratio is 0.3...10.8*.3*.3)
you can use the geometric mean to find this center value easily...
(18*8)^(1/2)=12
Answer: The answer is d. 64 units
23,039.
y=13,000(1.045)^t
t=13
You get 1.045 because you add 1+ the percentage in decimal form.
1.6 min. per lap
All you have to do is divide 20 by 12.5
9x + 4 = 58
9x = 54
x = 6
The number is 6.