Agarden snail moves 1/8 foot in 3/10 minute. what is the garden snail's rate of movement in feet per minute

Richter defined the magnitude of an earthquake to be m = log i/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. the magnitude of a standard earthquake is m = log s/s =