I need help! I don't understand

1. $5.53 2. 7.50Step-by-step explanation:You divide the numbers to get the price for one unit (one inch of necklace) 82.99/15 & 112.59/15 and round ...

It would be the compounded unrest earns about 5 more. The simple interest rate formula is I=Prt and compound is A=P(1+r) t in squared form. So to get the 5 more you would divide by how many years and that made it about 5 more a year. Hope that makes sense! :)