Find each indicated measure for O. I need the answers to questions 23-28!

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

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.

Someone me what is the area of this figure? 18m 18m 8m 16m