an object is thrown upward from a heigh of 50 feet with an initial velocity of 48 feet per second. the height in feet after t seconds is given by...

an object is thrown upward from a heigh of 50 feet with an initial velocity of 48 feet per second. the height in feet after t seconds is given by h=-16t^2+48t+50. find the height of the object after 3 seconds after it is thrown upward. and find the maximum height of the object and the time it takes the object to reach this height.