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logarithms

1. Convert the exponential to a logarithm 3^4 = 81
log base 81 of 4 = 3, log base 4 of 81 = 3, log base 3 of 81 = 4, log base 3 of 4 = 81
2. 81^ 3/4
9, 27, 3/4, 81
3. Which of the following would shift the function left 2, up 2 and flip it over the x-axis?
-f(x %2b 2) - 2, -f(x %2b 2) %2b 2, -f(x - 2) %2b 2, -f(x - 2) - 2
4. Using the Richter scale formula, determine the magnitude of an earthquake with seismic energy of 1.12 x 10^12 joules
7.6, 1.12 web tool , 12, 5.1
5. Evaluate ln 380
5.94, 2.58, 380, 4.89