If anyone could me it would be deeply appreciated!

To finance her community college education, sarah takes out a loan for $2900. after a year sarah decides to pay off the interest, which is 4% of $2900. how much will she pay

If a suspect is in possession of 20 grams of cocaine how many ounces does he possess what will the charge be

Acollection of nickels and quarters is worth $2.85. there are 3 more nickels than quarters.how many nickels and quarters are there?