Serious answers only | multiple choice

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

For the equations below which statement is true ? -2x=14 6x=-42

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.