Mikalee, a fighter pilot, ejects from her burning plane. Once she is safely on the ground, she launches a flare to attract the attention of a rescue plane. The initial velocity of the flare is 1600 ft/sec. The height of the flare, h(t), at any time, t, is modeled by the function h(t) = - 16t^2 + 1600t.

What is the maximum height of the flare?

50 ft

40000 ft

400 ft

4000 ft

Question

Mikalee, a fighter pilot, ejects from her burning plane.  Once she is safely on the ground, she launches a flare to attract the attention of a rescue plane.  The initial velocity of the flare is 1600 ft/sec.  The height of the flare, h(t), at any time, t, is modeled by the function h(t) = - 16t^2 + 1600t.

What is the maximum height of the flare?

		
50 ft

		
40000 ft

		
400 ft
		
4000 ft

anonymous · Answer

jeez h ow many more of these you got?

anonymous · Answer

20..

anonymous · Answer

max is at $t=-\frac{b}{2a}=\frac{1600}{32}=50$ then compute 
$$f(50)=-16\times 50^2+1600\times 50=40,000$$

anonymous · Answer

So B?