If

denotes the sum of the first

terms of a geometric series with first term

and common ratio

, then





Using summation notation, you have

In this case, you have

,

, and

. So the value of the sum is

Rounded to the nearest whole number, the answer would be 3.
By Pythagoras Theorem,
the length of the other leg= (12^2-9^2)^1/2
hope this helps
Answer:b
Step-by-step explanation:i took the test its right i promise
Answer: 55
Step-by-step explanation:
ape