4.13 If \( n \) is the largest integer for which \( n^{200}<5^{300} \), determine the value (NOV 2020) of \( n \).

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

\( \left(\log _{9} 4\right) \cdot\left(\log _{4} 5\right) \cdot\left(\log _{5} 6\right) \cdot\left(\log _{6} 7\right) \cdot\left(\log _{5} 8\right) \cdot\left(\log _{5} 9\right)= \) (A) 4

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: \( \square \% \)

Express \( x^{\frac{3}{4}} \) in terms of a radical expression.

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