Please tell me the answer if you know I really need help

(40 points) i need some . an answer definition is appreciated as well.

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.