document.write( "Question 859322: t = 0 seconds. Its height, in meters above sea-level, as a function of time is given by h(t) = -4.9t^2 + 310 t + 178. \r
\n" ); document.write( "\n" ); document.write( "Assuming that the rocket will splash down into the ocean, at what time does splashdown occur?
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Algebra.Com's Answer #517689 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
You would look for the t-intercept, using t-axis as the horizontal axis.\r
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\n" ); document.write( "\n" ); document.write( "\"d=310%5E2-4%28-4.9%29178\"
\n" ); document.write( "\"d=99588.8\"\r
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\n" ); document.write( "\n" ); document.write( "Taking the positive result, \"t=%28-310-sqrt%28d%29%29%2F%282%2A%28-4.9%29%29\"
\n" ); document.write( "\"t=%28315.6%2B310%29%2F%289.8%29\"
\n" ); document.write( "\"t=63.8\" seconds
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