Answer:
H = 600 ft.
[tex]H_{max} =885.6[/tex] ft at x =239 ft.
Step-by-step explanation:
The path of a motorcycle is given by [tex]H =-0.005x^{2}+2.39x + 600[/tex] .....(1) where H is the height above the river in ft and x is the distance from his launch camp.
Putting x = 0, the height of the launch camp from the river is H = 600 ft.
Now. differentiating equation (1), with respect to x both sides we get,
[tex]\frac{dH}{dx} = 0.01x -2.39 =0[/tex] {Condition for H to be maximum is [tex]\frac{dH}{dx} =0[/tex]}
⇒ x = 239 ft.
So, [tex]H_{max} = -0.005 (239)^{2} + 2.39 \times 239 + 600 =885.6[/tex] ft. (Answer)