9. Suppose a population grows according to the linear growth model. In the year \( 2009\left(P_{0}\right) \), the population was 25,000 . The population is growing by 800 people each year. Show the explicit formula for the population (for \( \left.P_{N}\right) \), then show your calculations using it to predict the population in 2012 .

Suppose we want to choose 6 objects, without replacement, from 11 distinct objects. \( \begin{array}{l}\text { (a) If the order of the choices does not matter, how many ways can this be done? } \\ \text { (b) If the order of the choices matters, how many ways can this be done? } \\ \square\end{array} \)

6. Estimate the product by rounding each number to the nearest ten. Ther compute the product. \( 83 \times 646 \) Estimate: Actual product: Is your estimate an underestimate or overestimate?

d) \( (-10+6 \cdot 3)^{2}-\sqrt[3]{-3-24}+6^{0} \)

1. \( x^{n} 2+5 x+6=0 \)

a. 3 horas e 15 minutos b. 3 horas e 20 minutos c. 2 horas e 10 minutos d. 2 horas e 15 minutos e. 3 horas e 30 minutos