1.06418
The same as of sec 20 degrees in radians to obtain 20 degrees in radian multiply 20° by / 180° = 1/9
0 = -16t^2 -60t +54
t = 0.75 seconds
solving by the quadratic equation or graphing calculator or completing the square.
G(-1/4)>=17/(-1/4)
g>=-68
8x=64
8x/8=64/8
x=8