Answer:

Step-by-step explanation:
Let the first term be
, then the terms of the sequence are:
.
Since the fourth term is 108, we have


Hence the sequence becomes:
.
The explicit expression for a geometric expression is given by:

where a=4 and r=3
The required formula is:

Step-by-step explanation:
d is correct answer as i think.
Answer:
A) July, September
B) June
Step-by-step explanation:
The 15% is 1.8
All you have to do is multiply 12 by .15 to get the answer, which is 1.80
4x = 8, so x = 2
5y + 4 = 4, so 5y = 0, so y = 0
(2,0)