An account invested in a money market fund grew from $73,250.57 to $73,543.58 in a month. What was the interest rate to the nearest tenth? What was the interest rate? % (Do not round until the final answer. Then round to the nearest tenth as needed.)

What was the annual mortgage rate for 2007? What was the smallest difference between the annual mortgage rate and the Treasury bill interest rate from 1998 to 2006, and what was the year? Mark all that apply. The smallest difference is   %    %.

On January 1, 2018, $1,000 is placed in an account that earns 5% annual interest corpounded quarterly account on January 1, 2021? (Round your answer to the nearest cent.)

Ernie Rolph borrowed $5100 at 6% annual simple interest. If exactly 1 year later he was able to repay the loan without penalty, how much interest would he owe? Ernie will owe $ in interest.