91Ó°ÊÓ

In a group of 5 freshman, 10 sophomores, 3 juniors, and 2 seniors, how many ways can a president, vice president, and treasurer be elected?

For the following exercises, use the following data: An elementary school survey found that 350 of the 500 students preferred soot to milk. Suppose 8 children from the school are attending a birthday party. (Show calculations and round to the nearest tenth of a percent.) What is the percent chance that exactly 3 of the children attending the party prefer soda?

Write an explicit formula for the arithmetic sequence \(15.6,15,14.4,13.8, \ldots\) and then find the \(32^{\text { nd }}\) term.

Write a recursive formula for the geometric sequence \(\quad 1,-\frac{1}{2}, \frac{1}{4},-\frac{1}{8}, \ldots\)