1979 to 2020 is how many years

How far could you drive on 50 gallons of gas

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?

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?