document.write( "Question 77870: The height of an object dropped from a 205 feet tall building is given by h = -16t squared + 205. When will the object be 36 feet above the ground \n" ); document.write( "
Algebra.Com's Answer #55874 by ankor@dixie-net.com(22740)\"\" \"About 
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The height of an object dropped from a 205 feet tall building is given by h = -16t squared + 205. When will the object be 36 feet above the ground
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\n" ); document.write( "Substitute 36 for h:
\n" ); document.write( "-16t^2 + 205 = 36
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\n" ); document.write( "-16t^2 = 36 - 205; Subtract 205 from both sides
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\n" ); document.write( "16t^2 = 169; multiplied equation by -1
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\n" ); document.write( "sqrt(16t^2) = sqrt(169); find the square root of both sides
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\n" ); document.write( "4t = 13
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\n" ); document.write( "t = 13/4
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\n" ); document.write( "t = 3.25 seconds it will be 36 ft above the ground:
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\n" ); document.write( "Check by substituting 3.25 for x, in -16t^2 + 205
\n" ); document.write( "-16(3.25^2) + 205 =
\n" ); document.write( "-16(10.5625) + 205
\n" ); document.write( "-169 + 205 = 36 \n" ); document.write( "
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