How do you compare 7/8 ___ 15/16 ?

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

Select the quadratic that has root x = 8 and x = -5

What is the total surface area of this square pyramid?