document.write( "Question 873278: I need some help.
\n" ); document.write( "If a homemade rocket is propelled upward from ground level with an initial velocity of 112 feet per second, after t seconds, its height h in feet is given by the formula h=-16t^2+112t. After how many seconds will its height be 160 feet? \n" ); document.write( "

Algebra.Com's Answer #526747 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!
2 sec
\n" ); document.write( "160=-16t^2+112t
\n" ); document.write( "t^2 -7t + 10 = 0
\n" ); document.write( "(t -2)(t-7) = 0, t = 2sec it will first be at 160ft \n" ); document.write( "

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