document.write( "Question 1071189: You can model an arch at your school using the equation y=−0.9(x+3)(x−3)y=−0.9(x+3)(x−3), where xx and yy are measured in feet. The x-axis represents the ground. Find the width of the arch at ground level.
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Algebra.Com's Answer #686120 by MathTherapy(10555) $\"\"$ $\"About$

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\n" ); document.write( "You can model an arch at your school using the equation y=−0.9(x+3)(x−3)y=−0.9(x+3)(x−3), where xx and yy are measured in feet. The x-axis represents the ground. Find the width of the arch at ground level.
\n" ); document.write( "The width of the arch at ground level is
\n" ); document.write( " feet.
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Based on the given equation, x + 3 = 0, and x - 3 = 0, so roots are: - 3, and 3. 
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document.write( "Distance from - 3 to 3 is: 3 - - 3, or 3 + 3, or .
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document.write( "That's it!! \n" );
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