I am very confused, if somebody could help me it would mean alot. :)

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Factor the polynomial. b^2 + 4b + 4