A hovercraft takes off from a platform.Its height (in meters), x seconds after takeoff, is modeled by:h(x)=−3(x−3)2+108What is the height of the hovercraft at the time of takeoff?meters
Q. A hovercraft takes off from a platform.Its height (in meters), x seconds after takeoff, is modeled by:h(x)=−3(x−3)2+108What is the height of the hovercraft at the time of takeoff?meters
Identify takeoff time: Identify the time of takeoff.The time of takeoff is when x=0, since x represents the time in seconds after takeoff.
Substitute x=0: Substitute x=0 into the height equation.We have the equation h(x)=−3(x−3)2+108. To find the height at takeoff, we substitute x=0 into this equation.h(0)=−3(0−3)2+108
Calculate height at takeoff: Calculate the height at takeoff.h(0)=−3(0−3)2+108h(0)=−3(−3)2+108h(0)=−3(9)+108h(0)=−27+108h(0)=81
More problems from Solve quadratic equations: word problems