document.write( "Question 189306: can you please help me with this equation???\r
\n" ); document.write( "\n" ); document.write( "Use your graphing calculator to find how many seconds before the projectile hits the ground. Let \"+y1=-16t%5E2%2B800t+\" , or factor and solve for t algebraically. \r
\n" ); document.write( "\n" ); document.write( "a. 0 seconds
\n" ); document.write( "b. 50 seconds
\n" ); document.write( "

Algebra.Com's Answer #142019 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
Use your graphing calculator to find how many seconds before the projectile hits the ground. Let \"+y1=-16t%5E2%2B800t+\" , or factor and solve for t algebraically. \r
\n" ); document.write( "\n" ); document.write( "a. 0 seconds
\n" ); document.write( "b. 50 seconds
\n" ); document.write( "-----------------
\n" ); document.write( "= -16t^2 + 800t
\n" ); document.write( "16t^2 = 800t
\n" ); document.write( "y1 = 0 at t = 0 and at t = 50
\n" ); document.write( "t = 0 is the time of the launch.
\n" ); document.write( "t = 50 is the time of return.
\n" ); document.write( "t = 50 seconds
\n" ); document.write( "b. 50 seconds
\n" ); document.write( "
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