Tia cut 4-meters 8-centimeters wire into 10m equal pieces. marta cut a 540-centimeters wire into 9 equal pieces. how much longer is one of martas wire then one of tias?

Based on what i know about mean, this doesn't add up.

Ineed in figuring out this problem.

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.