3more than twice as many ringtones as mary

What is the volume of the sphere shown below with a radius of 3?

Me n o w. i need t h i s. 10 points

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?