9/81 is equivalent to which fraction?

3/9
1/18
1/9
5/9

Apple pie is removed from 350 degree oven. temperature of the pie t minutes after being removed id given by the function t(t)=72+268e-0.068t

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)