Calculus Help! :) |
Calculus Help! :) |
Feb 5 2009, 11:27 PM
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#1
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Senior Member Group: Member Posts: 242 Joined: Feb 2007 Member No: 506,682 |
A road sign at the top of a mountain indicates that for the next 4 miles the grade is 12%. Find the angle of the grade and the change in elevation for a car descending the mountain.
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Feb 6 2009, 01:46 PM
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#2
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Sing to Me Group: Member Posts: 1,825 Joined: Apr 2004 Member No: 10,808 |
Find a problem like that in your notes and in your textbook. This seems to simple to ask for someone's help (where here you'll most likely get the answer without you actually understanding it).
If you're actually really stuck, explain what you've done so far and why you need help. |
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Feb 7 2009, 11:02 PM
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#3
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Senior Member Group: Staff Alumni Posts: 4,665 Joined: Aug 2008 Member No: 676,364 |
Calculus = Smart People
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*BOSS* |
Feb 7 2009, 11:13 PM
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#4
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Guest |
The answer is true
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Feb 17 2009, 08:01 PM
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#5
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We're Over 9,000!!!1! Group: Human Posts: 307 Joined: Jan 2006 Member No: 352,435 |
I'm really bad at word problems in calculus but I think you need to use tan theta to find the angle. Then after you find the angle, you'd need to find the change in elevation from which the car is descending so that means rate of change. dy/dx.
Since the sign is at the top of the mountain, it forms a triangle. You need to derive the Pythagorean theorem to find the rate of change of elevation. I'm sorry I couldn't be of more help. |
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