Seven and nine hundredths in decimal form?

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

Factor the monomial completely 42a3b3

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76