Double-check my answer and receive the brainlest! Question: Which of the following can be used to evaluate the series sum {k=1}^9/2(4)^{k-1}?

My 2 [(1-4)^10/ (1-4)]

Available Answer Choices:

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?