More on Finance, how to calculate compound interest?

Question

If I put $200 in a savings account at the beginning of each year for 10 years and then allow the account to compound for an additional 10 years, how much will be in my account at the end of the 20th year? Assuming that the account earns 10% and rounding to the nearest $100.

Answer 1

What kind of savings account gives you 10% interest? And anyway, why would you only want to save $200? Very mind-boggling. Why would you want to know the answer? Is this your homework?
Anyway, just for the heck of answering:
Use a financial calculator.
Key in 200, followed by pmt. (Payment)
Key in 10, followed by n. (No. of years)
Key in 10, followed by i. (Interest)
Compute the value.

The value that you get is how much you will have in your bank at the end of 10 years. That figure is your PV for the following calculations:

Take calculator, key in figure followed by PV.
Key in 10, followed by n.
Key in 10, followed by i.
Compute FV.

Tah dah! The answer you want!

Answer 2

$8,523.64