The quadratic function is given by the equation
The maximal height will be at vertex. Find t-coordinate of the parabola vertex:
At t=4,
Answer: it will take 4 seconds for the ball to reach the maximal height of 3.7 feet.
keeping in mind that complex roots never come alone, their sister is always with them, the conjugate, so if we know that "i" or namely "0 + i" is there, her sister the conjugate "0 +i" must also be there too, so let's take a peek
Check the picture below.
1/2+-2/5t(+2/5)=1/5t+t(+2/5)
simplify
1/2=2 and 3/5t
change to a decimal
.5 = 2.6t
divide both sides by 2.6
.5/2.6 2.6t/2.6
you get T= .3125
Hope it can solve you problem... :)