On earth, the height, h metres, of an object fired upward from the earth's surface at 48m/s is described by the equation h=48t-16t^2 where t seconds is the time since the object was fired upward.
Determine:
A.) the maximum height of the object
B.) the times at which the object is 32m above the ground
C.) the time at which the object hits the ground
D.) the equation in vertex form

PLEASE HELP ME :( I CAN'T ANSWER IT :(

Question

On earth, the height, h metres, of an object fired upward from the earth's surface at 48m/s is described by the equation h=48t-16t^2 where t seconds is the time since the object was fired upward.
Determine:
A.) the maximum height of the object
B.) the times at which the object is 32m above the ground
C.) the time at which the object hits the ground
D.) the equation in vertex form


PLEASE HELP ME :( I CAN'T ANSWER IT :(

mathmale · Answer

"maximum height?"  Think:  vertex.  Know how to find the time value, t, at which the graph has its vertex?  There's a common formula for "vertex x-coordinate."