Find the circumference of this circle

Abag of popcorn contains 483 calories and servers 3.5 people. how many calories are in each serving.

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

If angle 2=3x +1 and angle 3=2x +4what is angle 2