Answer:
A grade of 7% = 7 / 100 ;
This means that the elevation or vertical heighy of the interstate highway changes 7 feets for every 100 feets of horizontal distance moved
Explanation:
Given that :
A road has a grade of 7%. This means that the slope of the of the highway is 7%. The slope is the proportion of rise and run. Hence the change in vertical distance with horizontal distance moved.
A grade of 7% = 7 / 100 ;
This means that the elevation or vertical heighy of the interstate highway changes 7 feets for every 100 feets of horizontal distance moved