Keyon buys a bag of cookies that contains 5 chocolate chip cookies, 5 peanut butter cookies, 9 sugar cookies and 6 oatmeal cookies. What is the probability that Keyon reaches in the bag and randomly selects an oatmeal cookie from the bag, eats it, then reaches back in the bag and randomly selects a sugar cookie? Round your answer to four decimal places.

**i33.) What is the value of \( x \) and \( y \) ? \( \begin{array}{l}\text { a) } x=13, y=48 \\ \text { b) } x=-3.04, y=132 \\ \text { c) } x=13, y=132 \\ \text { d) } x=-3.04, y=48\end{array} \)

Estimate the percentage of students that spend more than 20.7 hours perweck on course material.

\#11 Evaluate each expression: \( 12+2= \) \( 120+2= \) \( 1,200+2= \)

15. Ao comprar uma mercadoria de R\$ 130,00 , um re- vendedor pretende lucrar a partir da venda deste item, aplicando um aumento de \( 25 \% \) sobre o valor de com- pra. Sabendo disso responda: a) Qual será o lucro, em reais, deste revendedor? b) Qual será o percentual de lucro sobre o preço de venda? c) Caso ele pretenda aumentar mais \( 12 \% \), qual será o novo valor desta mercadoria? d) Qual será o novo percentual de lucro, sobre o pre- ço de venda acrescido de \( 12 \% \) ?

\( \Rightarrow 2 ^ { 2 x - 3 } = ( 4 ) ( 2 ^ { x } ) \)