Answer:
Hey there!
We have an=a1(r^n-1), which is the formula for a geometric sequence.
The common ratio is 3, and 2 is the 1st term.
Thus, we have a1=2(3)^(n-1)
Hope this helps :)
You take 45 and divide it by 15 and you get, 3 cubic feet
The "t" cross out so you are left with r -3 s/r2 s1.
Subtract the S and get s4.
Your answer is r to the -6 and s to the 4.
I hope this helps!!!
