Which type of bond results in compounds that are electrolytes? (A) lonic (B) Covalent (C) Metallic (D) None of the above

d. \( \frac{1}{2}-\frac{1}{3}=1-\frac{5}{8} x \)

59. [Application] Marine Corps. The total number of active U.S. Marine Corps (in thousands), during 2005-2019 can be approximated by the function \[ M(t)=0.042 t^{3}-1.1718 t^{2}+8.4 t+182.2122 \text {, } \] where \( t=0 \) represents 2005 . The model indicates the total number of active U.S. Marine Corps in 2008 as 198,000 . Find another year after 2008 when the model indicates the same number of active U.S. Marine Corps. (The model was generated using the data from the U.S. Department of Defense budget report.)

Solve for \( f \) \[ \begin{array}{l}f=-2+\frac{4}{5} f-3 \\ f=\square\end{array} \]

\( (5) \) จงแยกตัวประกอบของ \( 180 x^{4}+160 x^{2}-20 \)

(5) En la lormación del ácido niltico tiene lugar la siguiente reación \( \mathrm{N}_{2} \mathrm{O}_{5}+\mathrm{H}_{2} \mathrm{O} \) Para formar 630 g del ádido se necesitan 540 g del ódodo. Calcula. a) La cantidad de agua necesaria para que se complete la reacción anterior