9. Between the years 2000 and 2010 , the number of births in the town of Danville increased from 1432 to 2219 . Which of the following is the approximate percent of the increase in the number of births during those ten years?

\begin{tabular}{|l}\hline Concept 3.14 - More Arithmetic with Complex Numbers \\ 1. Select all expressions that are equivalent to \( 8+16 i \) \\ a. \( 2(4+8 i) \) \\ b. \( 2 i(8-4 i) \) \\ c. \( 4(2 i-4) \) \\ d. \( 4 i(4-2 i) \) \\ e. \( -2 i(-8-4 i) \)\end{tabular}

\( 35 \% \) of the seats in a bus are occupied. There are a total of 400 seats. How many seats are not occupied?

- Какое из следующих чисел заключено междд числами \( \frac{19}{16} \) и \( \frac{22}{17} \) ? \( \begin{array}{llll}\text { 1) } 1,0 & \text { 2) } 1,1 & \text { 3) } 1,2 & \text { 4) } 1,3\end{array} \)

4. Del dinero que lleva mi mamá al mercado, gasta el \( 20 \% \) en fruta, el \( 35 \% \) en carne y el \( 30 \% \) en menestras y tubérculos. Si el resto, se emplea en leche y yogur, ¿qué tanto por ciento gasta en leche y yogur?

There are 250 people in a hall. \( 30 \% \) of them wear glasses. How many people do 1ot wear glasses?