three different questions

Solve for the unknown interest rate in each of the following: Present Value Years Interest Rate Future Value $221 4 $307 1,000 35 1,000,000 Present Value Years Interest Rate Future Value $250 4% $1,000 10,000 10 1,000,000 You have just made your first $2,000 contribution to your individual retirement account. Assuming you earn a 12 percent rate of return and make no additional contributions, what will your account be worth when you retire in 45 years? What if you wait 10 years before contributing