Given: 4n^2 + 25 = -20x, what is the value of the discriminant?

I'm terrible at math any here is appreciated.

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.

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5