Yes D is the correct option !
if you want to know how , comment, or you are good to go !

he then turns around and grabs that money and sticks it for another 9 years,

add both amounts, and that's how much is for the whole 21 years.
Answer: X= -1
Step-by-step explanation: In this equation you want to solve for "x"
You subtract 6-6=0 leaving "x" by itself. So the equation will look like this: 6x= -6
After this you want to divide by 6 to one side and to the other equaling "x" as -1
Answer:
12288
Step-by-step explanation:
its a geometric sequence where each term is 4 x the term before it
so the 7th term = 3 *4^6 = 12288