document.write( "Question 311149: PLEASE HELP ASAP! ADA says a ramp can go up at most 1 foot for every 12 feet of horizontal distance.A ramp in San Francisco at the Hotel Nikko rises 5.6 inches over a horizontal span of 4'7\". Is the ramp to code?Include, the maximum angle of elevation, the minimum ramp length for 12 feet of horizontal and 1 foot of rise. Please show all work. Thanks! I am so confused on how to do this... \n" ); document.write( "

Algebra.Com's Answer #222533 by Alan3354(69443) $\"\"$ $\"About$

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ADA says a ramp can go up at most 1 foot for every 12 feet of horizontal distance.A ramp in San Francisco at the Hotel Nikko rises 5.6 inches over a horizontal span of 4'7\". Is the ramp to code?Include, the maximum angle of elevation, the minimum ramp length for 12 feet of horizontal and 1 foot of rise. Please show all work.
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\n" ); document.write( "1 ft in 12 = 1 inch per foot = 1/12\" rise per inch horizontal
\n" ); document.write( "4'7\" = 71 inches
\n" ); document.write( "71*(1/12) = 5.912\", the max allowed rise in that horizontal distance.
\n" ); document.write( "5.6\" is less than that, so it's legal.
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\n" ); document.write( "The max angle is the arctan(1/12) =~ 4.76º
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\n" ); document.write( "The ramp length is the hypotenuse of the right triangle with legs of 1' and 12'
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s = sqrt(1+144) = 12.0416 feet, or 12' 0.449\"
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\n" ); document.write( "Feet and inches are tedious and inconvenient compared to the metric system. \n" ); document.write( "

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