A certain NYC taxi driver has decided to start charging a rate of r cents per person per mile. How much, in dollars, would it cost 8 people to travel x miles if he decides to give them a 50% discount?  Pick one:
A) 3xr/2 B) 3x/200r C) 3r/200x D) xr/25 E) xr/600
8xr/2 is in cents - 8xr/200 dollars = xr/25   Answer : xr/25
<result>D</result>
A certain NYC taxi driver has decided to start charging a rate of r cents per person per mile. How much, in dollars, would it cost 8 people to travel x miles if he decides to give them a 50% discount?