16. Write What is the inverse of the following statement? If a building has more than four floors, then it has an elevator.

Check the factorization by multiplyin Factor: \( m^{2}+m-2 \) -20

a. \( \left(27 x^{9}\right)^{\frac{1}{3}} \) b. \( \left(3 x^{\frac{1}{2}} y^{\frac{3}{2}}\right)^{2} \) c. \( \left(\left(-4 x^{6} y^{-3}\right)\left(-2 x^{-2} y^{2}\right)\right)^{\frac{1}{2}} \) d. \( \frac{\left(x^{-\frac{1}{8}} y\right)^{-2}\left(x^{4} y^{6}\right)^{-\frac{1}{2}}}{x^{\frac{1}{4}} y^{4}} \)

1. The length of a rectangle is 4 meters less than twice its width. The area of the rectangle is \( 70 \mathrm{~m}^{2} \). Find the dimensions of the rectangle.

(2) \( \lim _{x \rightarrow \infty} \frac{3+\frac{2}{x^{3}}-3 x^{4}}{9 x^{4}-\frac{5}{x^{2}}-3} \)

\( 9{}_{58}P_{9=3} \)