What are the solutions(s) to the quadratic equation 40 - x2 = 0?

Which best explains why this triangle is or is not a right triangle?

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.

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?