A model rocket is launched from a raised platform at a speed of 144 feet per second. Its height in feet is given by h (t) = - 16t 2 + 144t + 20 (t = seconds after launch). After how many seconds does the object reach its maximum height? 20 seconds
6.5 seconds
2.25 seconds
4.5 seconds
+4
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Home » Mathematics » A model rocket is launched from a raised platform at a speed of 144 feet per second. Its height in feet is given by h (t) = - 16t 2 + 144t + 20 (t = seconds after launch). After how many seconds does the object reach its maximum height? 20 seconds 6.