Cv0627 answer this :))

Which function has the domain x> -11?

Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?

Give another definition of variability and explain how it can be calculated.