Measurement in Mexico

I recently got back from my vacation to the beautiful Riviera Maya in Mexico. On the way from the airport to our hotel, I looked at the speedometer of our driver and saw his speed was over 100. Freaking out a little, I did a double take. That is when I noticed it was not miles per hour; It was kilometers per hour. The MathNut in me got really excited that I could use this in the classroom. The speed limit was 100 Km/h.  When we got to the hotel, the thermostat was in degrees Celsius. Since I like it nice and cool, I kept it a 19˚.  Possible Questions: How fast was my driver going in mile per/ hour? How cold was my room in degree Fahrenheit?