Phil hopes to be chosen as one of 16 teenagers to go on a trip. If only 3 teenagers are chosen, find the probability that Phil is one of them.

The probability that any student passes a math test is 14. In a group of 5 students, find the probability that 3 pass.

8 students compete for 2 winning spots on a sports team. Alan is one of the 8 students. If all students are equally likely to win a spot, find the probability that Alan is one of those winners.

x-y=80 and x–y=5. Find the value of x+y.

Find the surface area of a sphere with the volume of 27π.

A factory in Hackensack manufactures T-shirts. The factory has monthly operating costs of $14,000 per month regardless of how many shirts are produced. Additionally, the factory must spend $7.45 for each shirt produced. In July, the total factory costs were $19,000. Approximately how many shirts were produced? Find an expression for C(n) where cost is[…]