Sea \( A=\{1,2,3\} \) y \( B=\{1,2,3,4,5,6\} \) y \( R \) la relación de \( A \) en \( B \) definida por "el doble de", entonces, , cuál de las sigutentes alternativas representa la funcion de la relación \( R \) ? (A) \( R=\{(2,1),(4,2),(6,3)\} \) (B) \( R=\{(1,2),(2,4),(2,6)\} \) (C) \( R=\{(1,1),(1,4),(1,6)\} \) (D) \( R=\{(1,2),(2,4),(3,6)\} \)

Write \( 68 \% \) as a fraction in simplest form

\( \begin{array}{llll}i^{30}+i^{40}+i^{60}= & \text { B. } 1 & \text { C. }-i & \text { D. } i\end{array} \)

Simplify: \( \frac{(6.25)^{\frac{1}{2}} \times(0.0144)^{\frac{1}{2}}+1}{(0.027)^{\frac{1}{3}} \times(81)^{\frac{1}{4}}} \)

7. \( 3 \sqrt{2}+4 \sqrt{8}-5 \sqrt{50}+8 \sqrt{32} \)

Rewrite the fraction in the sentence below as a percentage. In a certain class, \( \frac{21}{25} \) of the students got problem 5 wrong on Friday's math test. Percent notation: \( \square \% \)