## Saturday, September 29, 2012

### Math Using Speedometers

Speed has vast appeal to our students. It embodies risk, excitement, prowess and fun. Speedometers, a basic speed meter that displays instantaneous speed, also offers many applications for educators to teach math. Here are just a few…

The speed limit for highway 95 is                         Your vehicle is traveling at

What is the difference between the two speeds?

Using the same question above, state the difference between the two speeds as a positive integer if speeding and a negative integer if below the speed limit (or vice versa if you would like)
Percentage Above or Below:

--Using the difference in the posted speed and the actual speed, calculate the percentage of difference.
--Using the percentage difference and the posted speed, calculate the actual speed
Elementary Hypothesis Testing:
Based on the error rates of speedometers, what is the likelihood that the car traveling 1 mph over the speed limit is actually speeding?