The formula for a geometric sequence is an = a1 * r^n-1. For this problem, our formula can be an = 1 * 5^n-1. a1 is our first term, and r is the common ratio.
To check our formula, we can find the 5th term. a5 = 1 * 5^5-1. This gives us 625. If we look at our last term provided, the 4th term, 125 * 5 is 625.
The answer will be D. 100, this is because they show u that angle A is 55 meaning so is angle D because they r congruent, then they tell u that angle E is 25 meaning so is angle B because they r congruent, so now u have to add those up and get 80, now subtract that from 180 which has to be your total of the 3 angles and get 100
Hope this helps
Answer:
8
Step-by-step explanation: