You can factor -80 as

So, we have

The square root of a product is the product of the square roots:

Since
and
, we have

Okay, so we multiply..
And we know that a week = 7 days..
So..
2 * 2/3 * 7 = ???
We change the 2 into 2/1
THEN we multiply..
2/1 * 2/3 = 4/3
Then we change the 7 into 1/7.. ( Which is still a whole )
Then multiply again..
4/3 * 1/7 = 4/21
You can correct me if I'm wrong...
I hope this helps you!
The formula for the problem is: An = 8(n-1) - 2
Answer:
I
Step-by-step explanation:
I