Pls help me it detects if it’s right or wrong

Which is the completely factored from of xy^3-x^3y

Which of the following graphs represents the function f(x) = 2^x

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.