Question 1044085
"The equation {{{y=-16t^2+26t+105}}} describes the height (in feet) of a ball tossed up in the air at 26 feet per second from a height of 105 feet above the ground.
 In how many seconds will the ball hit the ground? Express your answer as a decimal rounded to the nearest tenth."
:
When it hits the ground y=0, therefore:
{{{-16t^2+26t+105 = 0}}}
Use the quadratic formula; a=-16; b=26; c=105
I got a positive solution: t=3.5 seconds