document.write( "Question 1154264: . You can model the arch of a building entrance by using the y=(-1/3)(x+6)(x-6), where x and y are measured in feet. The x-axis represents the ground, find the width of the arch at the ground. * \n" ); document.write( "
Algebra.Com's Answer #776671 by greenestamps(13200)\"\" \"About 
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\n" ); document.write( "The given form of the function tells you the x-intercepts are at -6 feet and +6 feet, so the arch is 12 feet wide at the ground.

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