Answer:
The sequence above is a geometric sequence
For an nth in a geometric sequence

where n is the number of terms
a is the first term
r is the common ratio
From the question
a = 45
r = 15 / 45
The explicit formula for the sequence is
U(n) = 45(1/3)^n-1
Hope this helps you
The answer is C 11 1/4 or 11.25 Cubic inches
1st: add 5 to each side
2nd: divide by 2 on each side
It would be $83.00 kid
Have a nice day!!!