Ateacher weighed 145 lbsin 1986 and weighs 190 lbs in 2007. what was the rate of change in weight

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?

Stefanie is painting her bedroom. she can paint 2 1/3 square feet in 4/5 of an hour. how many square feet can she paint in one hour?