A toy rocket is launched from a 3.5m high platform in such a way that its height, h (in meters), after t seconds is given by the equation h = -4.9t2 + 23.8t + 3.5 How long will it take for the rocket to hit the ground?
(Give the answer in seconds, type an integer or a decimal. Round to the nearest hundredth as needed)
Meg rowed her boat upstream a distance of 45 mi and then rowed back to the the starting point. The total time of the trip was 18 hours. If the rate of the current was 6 mph, find the average speed of the boat relative to the water.
Meg rowed an average speed of ___ mph relative to the water. (Simplify your answer).