
Concept explainers
To find out that the car was travelling in a posted limit prior to accident or not and also graph the given model

Answer to Problem 20Q
The car was travelling in a posted speed limit.
The of the given model is obtained.
Explanation of Solution
Given information:
The given model is
The length of the skid marks of the car is 90 feet
In order to find out whether the car was travelling in posted limit or not it is necessary to find out the speed of the car initially.
The speed of the car is obtained as,
Since the speed of the car is 37.95 mph it means it was travelling to the posted speed limit and most likely was not prior to accident.
The graph of the model can be represented as,
Chapter 5 Solutions
BIG IDEAS MATH Algebra 2: Common Core Student Edition 2015
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