document.write( "Question 50668: \"The polynomial -16t^2 + 200t represents the height, in feet, of a model rocket t seconds after launch. The rocket contains a small firecracker that explodes 6.2 seconds after launch. Jeremy launches teh rocket straight up into the air. If sound travels at about 1144 ft/s, how many seconds after launch will Jeremy hear the firecracker go off? Round the answer to the nearest tenth of a second. Show your work.\" \n" ); document.write( "

Algebra.Com's Answer #33751 by venugopalramana(3286) $\"\"$ $\"About$

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\"The polynomial -16t^2 + 200t represents the height, in feet, of a model rocket t seconds after launch. The rocket contains a small firecracker that explodes 6.2 seconds after launch. Jeremy launches teh rocket straight up into the air. If sound travels at about 1144 ft/s, how many seconds after launch will Jeremy hear the firecracker go off? Round the answer to the nearest tenth of a second. Show your work.\"
\n" ); document.write( "s=-16t^2+200t...at t=6.2 sec
\n" ); document.write( "s=-16*6.2^2+200*6.2=624.96 ft.
\n" ); document.write( "time to hear the sound =625/1144=0.55 sec \n" ); document.write( "

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