Help me pls! due soon

Question

You deposit $400 each month into an account earning 4% interest compounded monthly.

a) How much will you have in the account in 25 years?

$

b) How much total money will you put into the account?

$

c) How much total interest will you earn?

$

Answer 1

Many people have calculators that will do these calculations. Even so you should understand this sum of a geometric series:

a) https://drive.google.com/file/d/14_WnO9VPzDWrjDwKeNojnhA1_dHoDBg9/view?usp=sharing

b) total amount deposited is $400*12*25

c) interest is a) - b)