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Questions in mathematics

[Done] Find the indicated value of the logarithmic function. [tex]$\ln \left(e^{-4}\right)$[/tex]

[Done] Work out $\frac{2}{5} \times \frac{6}{7}$. Give your answer in its simplest form.

[Done] Find the difference between 44 and 109.

[Done] $z^4+2 z^2 \cos \alpha+1=0

[Done] A cell phone company surveyed 200 random customers on whether they were satisfied with their phone service. They also noted which service plan each customer had. The results are shown in the frequency table below. Use this table to create a relative frequency table. \begin{tabular}{|c|c|c|c|}\hline & Plan A & Plan B & Total \\ \hline Satisfied & 104 & 64 & 168 \\ \hline Not Satisfied & 8 & 24 & 32 \\ \hline Total & 112 & 88 & 200 \\ \hline \end{tabular} Drag each tile to the correct cell in the table. 4\% 16\% 100\% 56\% $12 \%$ 84\% 44\% 32\% 52\% \begin{tabular}{|c|c|c|} \hline & Plan A & Plan B \\ \hline Total & Satisfied & \\ \hline & & Not satisfied \\ \hline & & \\ \hline \end{tabular}

[Done] 1. Circle the better estimate for each sum or difference. a) 516 + 194 600 or 700 b) 401 + 394 700 or 800 c) 385 - 126 200 or 300 d) 613 - 209 300 or 400

[Done] Solve for x. 3x = 6x - 2

[Done] Find the least number that must be added to the following to get a perfect square in each case: a. 3451 b. 7896 c. 54,723 d. 18,355 e. 23,455

[Done] Below, fill in the table of values and use the table values to graph [tex]y=x-4[/tex]. | x | y=x-4 | |---|---| | -3 | | -2 | | -1 | | 0 | | 1 | | 2 | | 3 |

[Done] Type the correct answer in the box. Use numerals instead of words. What is the solution for $x$ in the equation? $10 x-4.5+3 x=12 x-1.1$ $x=\square$