HELP ASAP
I was told to explain why these are rational numbers!!!

True or false look at the picture pls : /

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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.