Respuesta :
Answer:
3Β²/β m
Step-by-step explanation:
Since h(x)= β(xβ11)(x+3) represents the height of the hovercraft after x seconds, at the time of takeoff, x = 0.
So, the height at takeoff is h(0) = β(0 β 11)(0 + 3)
= -(-11)/3
= 11/3 m
= 3Β²/β m