(2) The school coach decides to have each student throw 2 table tennis balls instead of one. Explain how this will affect the number of packs needed.

7. What is the quotient of \( 2 \frac{5}{6} \div 1 \frac{1}{3} \) ?

To plan for retirement, Bob deposits \( \$ 295 \) each quarter in an annuity that pays \( 7 \% \) interest, compounded quarterly. Payments will be made at the end of each quarter. Find the total value of the annuity in 28 years. Do not round any intermediate computations, and round your final answer to the nearest cent. If necessary, refer to the list of financial formulas.

\( \left. \begin{array} { r } { f ( x ) = \sin ^ { 2 } ( x ) , a = 0 } \\ { L ( x ) = \square } \end{array} \right. \)

What is the value of \( z^{*} \) for \( 90 \% \) confidence? 1.645 2.326 1.960 2.576

8) Choose the correct answer. Shen is one year older than Chai Yenn, while Chai Yenn is half Li's age. What more do you need to know to figure out their ages?