Positives and integers

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.

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

The slope of the line whose equation is 3y = 2x - 3 is 2 2/3 3/2