11. Hitunglah hasil dari \( \sqrt{75}-\sqrt{27} \) adalah \( \ldots \) A. \( 2 \sqrt{3} \) B. \( 4 \sqrt{3} \) C. \( 5 \sqrt{3} \) D. \( 6 \sqrt{3} \) E. \( 8 \sqrt{3} \)

The half-life of radium is 1690 years. If 60 grams are present now, how much will be present in 430 years? \( \square \) grams (Do not round until the final answer. Then round to the nearest thousandth as needed.)

Simplify \( \frac{8}{\sqrt{6}+2} \)

What function is the reflection of \( f(x)=|x+2| \) about the \( x \)-axis? \( g(x)=|x-2| \) Non of the other options \( g(x)=|-x+2| \) \( g(x)=-|x-2| \)

Simplify the logarithmic expression: \( \text{\log}_{2}(8) + \text{\log}_{2}(4) \)

Write the expression as a sum and/or difference of logarithms. Express powers as factors. \[ \log _{2}\left(\frac{x^{10}}{x-8}\right), x>8 \] \( \log _{2}\left(\frac{x^{10}}{x-8}\right)=\square \) (Simplify your answer.)