Question 53174
y = -16x^2 + 98x
0 = -16(x^2 - 6.125x)
0 = (x - 3.0625)^2
9.37890625 = (x - 3.0625)^2
+- 3.0625 = x - 3.0625
3.0625 +- 3.0625 = x
6.125 seconds
Mean: (0 + 6.125)/2 = 3.0625
y = -16(3.0625)^2 + 98(3.0625)
y = -16(9.890625) + 98(3.0625)
y = -150.0625 + 300.125
y = 150.0625m