How can properties of rational exponets be applied to simplify expressions with radical or rational exponets?

Q1) jin loves carrot yesterday she ate ½ of here carrots and today she ate 2/3 of the remaining carrots. she then discover that she has 12 carrots left. yesterday she must has started with carrots? a)36 b)48 c)60 d)72

The function below show how much jayna and hannah charge for babysitting. which statement best compares the two plants?

Plz hurry evaluate the expression a+b where a=8 and b=19