Graph, state domain and range: \( \quad y=-3 \sqrt{x+3}+5 \)

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

18. \( \frac{9!}{\mathrm{P}_{8}+\mathrm{P}_{7}} \)

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

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