The only interstate signed in metric in the US is Interstate 19, running between Nogales on the Mexican border (kilometer marker 0) and Tucson, AZ (kilometer marker 101).

A car leaves Nogales driving north to Tucson at 2PM. How fast must the driver travel to reach Tucson by 3PM? What about 3:10PM?

If that car leaves Nogales at t=0, measured in seconds, and drives at 75 MPH, write an expression that gives its position as a function of time. How long will it take to reach Tuscon?

Question

The only interstate signed in metric in the US is Interstate 19, running between Nogales on the Mexican border (kilometer marker 0) and Tucson, AZ (kilometer marker 101).

A car leaves Nogales driving north to Tucson at 2PM. How fast must the driver travel to reach Tucson by 3PM? What about 3:10PM?

If that car leaves Nogales at t=0, measured in seconds, and drives at 75 MPH, write an expression that gives its position as a function of time. How long will it take to reach Tuscon?