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March 30, 2017

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A roof rises 1.4 feet vertically and 11.8 feet horizontally. What is the grade of the roof? The grade of the roof is _____% how do I begin to find the answer to this

  • algebra - ,

    Grade is rise/run, or difference in elevation divided by the horizontal distance.
    If the roof rises 1.4' vertically over a horizontal distance of 11.8', the grade is 1.4/11.8=0.1186, or in percents, then multiply the above fraction by 100 to get
    1.4/11.8*100=11.86%.

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