Roy took out a 30-year loan for $155,000 at an APR of 5.5%, compounded monthly. Approximately what would be the total cost of his loan if he paid it off 4 years early?

A. $312,423.90

B. $316,825.20

C. $37,842.06

D. $274,581.84

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

I'm confused on this could anyone me and show me what i need to do to solve it.

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?