u put 900 in earning interest & after 10 years u have $6,000. simple interest is ___?

u put 1500 in, earn 7% cmpnded monthly, after 10 years it is __? borrow 165,000 at 4 percent interest monthly cmpdned, u amortize the loan in 30 years by monthly payments that are __?

___ amount is deposited yearly at 3 percent compounded annually. 6 years later the amount is 8 thousand, what is the annual deposit?