Asked by Kmil
                The height of a projectile fired upward is given by the formula 
s = v0t − 16t2,
where s is the height, v0 is the initial velocity, and t is the time. Find the time for a projectile to return to Earth if it has an initial velocity of 184 ft/s.
____________ s
            
        s = v0t − 16t2,
where s is the height, v0 is the initial velocity, and t is the time. Find the time for a projectile to return to Earth if it has an initial velocity of 184 ft/s.
____________ s
Answers
                    Answered by
            Damon
            
    Different initial up speed but use :
http://www.jiskha.com/display.cgi?id=1396965991#1396965991.1396967805
    
http://www.jiskha.com/display.cgi?id=1396965991#1396965991.1396967805
                    Answered by
            Bora Jhonsion
            
    if Sam fires a bullet straight upward with an initial velocity of 128 ft/sec, the height h of the bullet above the ground t sec after it is fired can be modeled by the equation h(t)=-16(t-4)^2+259
    
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