Need to know how to plug in number and to the formula for the following questions.

1. If I save $100 a month, how long will it take me to save $1000 in an account that earns 3% interest compounded monthly?
2. Use a formula and the amount set aside for savings each month ($100) to determine how long it will take to save enough to cover 6 months of expenses ($17,256) in the same account as above.