(Choose 1 answer)
(See picture)
A. 1(s)
B. 2(s)
C. 1.5(s)
D. None of the other choices is correct
E. 2.5(s)
the exam.
A ball is launched vertically upward such that its height (in meters) af t seconds is given by h(t) = 20t - 5t². Determine the time at which ball reaches its maximum height.
vant finish
