document.write( "Question 442097: Hilly areas often have road signs giving the percentage grade for the road. A 5% grade, for example, means that the altitude changes by 5 feet for each 100 feet of horizontal distance.\r
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Algebra.Com's Answer #305010 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
= arctan(3/100)
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