Homework Help: Pre-Calculus

Posted by Sam on Thursday, February 3, 2011 at 4:48pm.

74. Road Grade
When driving down a mountain road, you notice warning signs indicating that it is a "12% grade." This means that the slope of the road is -12/100. Approximate the amount of horizontal change in your position if you note from elevation markers that you have descended 2000 feet vertically.
I'm stuck I don't get it can you help. Whay do I need to find? Should I divide 2000ft. and -.12 to find the horizontal change?

Pre-Calculus - Reiny, Thursday, February 3, 2011 at 5:34pm
slope is defined as rise/run
you are given a rise of 2000 ft, we don't know the run
so set up the ration 2000/run = 12/100
12run = 2000(100)
run = 200000/12 = 16 667 ft
Pre-Calculus - Sam, Thursday, February 3, 2011 at 6:16pm
Now I understand! Thank You So Much!!!

Answer this Question

Related Questions

Pre-Calculus - A road sign at the top of a mountain indicates that for the next ...
Trigonometry - Mountain Descent A road sign at the top of a mountain indicates ...
Physics - you are driving up a long, inclined road. After 1.2 miles you notice ...
trig - A road runs from the base of a mountain. From two points 235 meters apart...
trig - A road runs from the base of a mountain. From two points 235 meters apart...
trig - A road runs from the base of a mountain. From two points 235 meters apart...
geometrey - The grade of a road is 7%. What angle does the road make with the ...
Physics - A car with bad shocks has a mass of 1500 kg. Before you go for a drive...
Physics - A car with bad shocks has a mass of 1500 kg. Before you go for a drive...
algebra - Driving down a mountain, Tom finds that he has descended 1800 ft in ...

For Further Reading

First Name:
School Subject:
Answer: