compound and continuous interest (a)

If $2,000 is invested at 4% interest, compounded continuously, for three years, what is the ending balance?

Luna saved up $2,200 working as a waitress over the summer. She put this money into a bank account that earned 5.2% interest and is compounded quarterly. How much will she have in her account at the end of 8 years?

Change $$1\frac{1}{5}$$ % to a decimal value that can be used in the compounding formulas

Michael invests $500 into an account with 4.8% interest, compounded monthly. How much will be in the account in 10 years?

Meghan puts $4,000 into a savings account which offers 8% interest and compounds continuously for 3 years. Which expression could be typed into the calculator to see how much money Meghan will have after 3 years?

What does the n stand for in this formula?

Jordan wants to accumulate $5,000,000 in 35 years for retirement. How much should he invest now if the investment earns 7% interest, compounded monthly?

What does r represent in the equation $$B=Pe^{rt}$$