Chris and Shauna are kind of quirky with numbers. They love…

Chris and Shauna are kind of quirky with numbers. They love all forms of the number seven. They want to buy a 1977 vintage Corvette for $77,777.77. If they pay 7.7% down and finance the rest over 77 months at 7.7% annual interest, what would be their monthly payment (at the end of each month)? 

Emily is trying to decide between investing $1,000 or $1,500…

Emily is trying to decide between investing $1,000 or $1,500 at the beginning of each year for the next 40 years into a retirement account yielding 10.78%. After 40 years, how much extra money will Emily have in her IRA if she invests $1,500 annually instead of $1,000 annually?