DISTANCE A bus is driving at 60 miles per hour toward a bus station that is 250 miles away. The function d = 250 – 60t represents the distance d from the bus station the bus is t hours after it has started driving. Find the zero of this function. Describe what this value means in this context. a. about 4.17 h; the bus will arrive at the station in approximately 4.17 hours; b. about 3.5 h; the bus will arrive at the station in approximately 3.5 hours; c. about 2.5 h; the bus will arrive at the station in approximately 2.5 hours; d. about 5.12 h; the bus will arrive at the station in approximately 5.12 hours;