An object is launched from 180 feet above the ground. the function that models the height, in feet, of the object after t seconds is given by f(t)= -16t^2+96t+180. which statement is true? a. the object will obtain a maximum height of 180 feet. b. the object will obtain a maximum height of 324 feet. c. the object will obtain a maximum height after 6 seconds. d. the object will obtain a maximum height after 7.5 seconds.