SOLUTION: The percent grade of a highway is the amount that the highway rises (or falls) in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for

Algebra ->  Points-lines-and-rays -> SOLUTION: The percent grade of a highway is the amount that the highway rises (or falls) in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for       Log On


   



Question 938003: The percent grade of a highway is the amount that the highway rises (or falls) in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance.
A. How many feet does a highway with a six percent grade rise in 2.5 miles of horizontal distance?
B. How many feet would a highway with a six percent grade rise in 90 miles of horizontal distance if the grade remained constant?
C. How is percent grade related to slope?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
5280ft = 1mi
A. .04%2F%281mi%29+=+x%2F%282.5mi%29 | Cross Multiply to solve x = .1mi 0r 528ft
B. .06%2F%281mi%29+=+x%2F%2890mi%29 = 5.4mi 0r 28,512ft
C. 100 times slope
for ex: 100%28.04%2F%281mi%29%29 = 4%