If it takes someone t minutes to drive, run, or walk a mile, then their average speed s (t) , in miles per hour, is given by the formula s ( t ) = 60 t for t > 0 Find s ( 1 ) and s ( 12 ) .

Answer 1

s(1) = 60(1) = 60 = 60 miles per 60

s(12) - 60(12)= 720

which really don't make sense. the equation or function seems to mix up distance with velocity. "s" is usually a letter that stands for distance not velocity.

velocity= speed = distance/time

s=d/t

s(1) = 1/t = 1 mile in 60 minutes, = 1 mph= (1/60) mpm= 5280 feet per minute = 88 feet per minute = about 1.47 feet per second

s(12) = 1/12 = 1 mile in 12 minutes = 1/1/5 = 5 mph