The dining room floor of Mark's house is 13 feet long by 15 feet wide. Mark's wife wants to cover the floor with 6 inch square wood tiles. The tiles are sold in boxes of 36 for \( \$ 38.90 \). What is the minimum number of boxes of tiles needed to cover the floor?

(6) \( 21-6 x=27-2 x \) (7) \( 11 x+5 x-1=65 x-36 \)

A species of mouse and a species of lizard both independently evolve darker coloration on a large lava flow. This would be considered an example of: polyploidy convergent evolution sexual selection genetic drift

\( \frac { - 2 x y \frac { \partial y } { \partial x } } { y ^ { 2 } } + \frac { 2 x y \frac { \partial y } { \partial x } - y ^ { 2 } } { x ^ { 2 } } = 0 \)

Explain how this sonar technology, has benefited mankind. What is the purpose of your technology? this technology being commonly used today? If yes, in what area(s)/industries?

(2.) \( \begin{array}{r}3,933 \\ \times \quad 4 \\ \hline\end{array} \)