document.write( "Question 962753: if a projectile is fired straight upward from the ground with an initial speed of 64 feet per second, then its height in feet after seconds is given by the function h(t)=-16t^2 + 64t. find the maximum height of the projectile. \n" ); document.write( "

Algebra.Com's Answer #588217 by lwsshak3(11628) $\"\"$ $\"About$

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if a projectile is fired straight upward from the ground with an initial speed of 64 feet per second, then its height in feet after seconds is given by the function h(t)=-16t^2 + 64t. find the maximum height of the projectile.
\n" ); document.write( "***
\n" ); document.write( "h(t)=-16t^2 + 64t
\n" ); document.write( "complete the square
\n" ); document.write( "h(t)=-16(t^2 -4t+4)+64
\n" ); document.write( "h(t)=-16(t-2)^2+64
\n" ); document.write( "This is an equation of a parabola that opens upward with vertex at (2,64)
\n" ); document.write( "maximum height of the projectile=64 ft (2 sec after it is fired) \n" ); document.write( "

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