Simplify the following expression completely: \( x^{11} \cdot x^{9} \)

Verify Cayl

1. गुणनखंड क (i) \( a^{2}- \) (iv) \( 9 a^{2} \) (vii) 25 (a 2. गणनखंड की

Use the change-of-base formula and a calculator to evaluate the logarithm. \( \log _{7} 42 \) \( \log _{7} 42 \approx \square \) (Do not round until the final answer. Then round to the nearest thousandth as needed.)

The coefficient of \( x \) in \( -3 x y^{2} \)

QUESTION 18 Expressing \( 2 \log x-3 \log y-\log 2 \) as a single logarithm is equal to \( \begin{array}{ll}\text { A. } \log (2 x y)^{2} & \text { B. } \log \left(\frac{2 x^{2}}{y^{3}}\right) \\ \text { C. } \log \left(\frac{x^{2}}{2 y^{3}}\right) & \text { D. } \log \left(\frac{x^{2}}{y^{3}}\right)\end{array} \)