Astone is launched off a building which is 95 feet high. its height at time t is given by the function h(t) = 95 + 10t − 4t2 where time is measured in seconds and height is measured in feet. at what time does the stone reach its maximum height?
a) t = 1.25 seconds
b) t = 2.5 seconds
c) t = 5.0 seconds
d) t = 7.5 seconds