Question

An earthquake wave travels 55 km of rock in 25seconds. Which equation represents the relationshipbetween t the number of seconds, and d, the totaldistance the wave travels?d=5/11td=1 4/7td= 2.2td=80t

Answer 1

First we calculate the velocity

`v=(d)/(t)=(55)/(25)=2.2`

then we can find an expression for the distance, since d=v*t

`d=2.2t`