Round the number to the place of the underlined digit. \( \begin{array}{lll}\text { 1. } 49.012 & \text { 2. } 2.308 & \text { 3. } 9.647\end{array} \)

If \( x<0 \), then \( \sqrt[3]{27 x^{3}}+\sqrt{9 x^{2}}= \)

A witch and a wizard each drink a magical potion that affects their height. The witch is 4.5 feet tall and will grow 0.25 inches per day after drinking her potion. - The wizard is 7.5 feet tall and will shrink 0.5 feet per day after drinking his potion. After how many days will the witch and the wizard be the same height?

2. Considere os números 1,3 e 5 . a) Quantos números de três algarismos distintos é possível montar?

Solve for \( u \). \[ 6+\frac{1}{u-1}=\frac{6}{u+1} \] If there is more than one solution, separate them with commas. If there is no solution, click on "No solution".

1.1.4 \( \quad 5^{2 x}-5^{x}=0 \)