document.write( "Question 180859: The height h, in feet, of a stone thrown with an upward speed of 40 ft/s is given by the formula h=40t-16t^2, where t is the time, in seconds, since the stone was thrown. How long does it take the stone to reach the highest point of its path of motion? \n" ); document.write( "
Algebra.Com's Answer #137142 by rapaljer(4671)![]() ![]() You can put this solution on YOUR website! Rewrite this equation as \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "h =-16t^2 + 40t \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "It is well-known that the highest point on a parabolic graph y=ax^2 +bx +c occurs at the value of \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "In this equation for h=-16t^2 + 40t, the maximum value of h occurs when \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "R^2 \n" ); document.write( " |