A quarterback throws an incomplete pass. The height of the football at time t is modeled by the equation h(t) = –16t^2 + 40t + 7. Rounded to the nearest tenth, the solutions to the equation when h(t) = 0 feet are –0.2 s and 2.7 s. Which solution can be eliminated and why?

Question

dedi · Answer

A)The solution –0.2 s can be eliminated because time cannot be a negative value.
B)The solution –0.2 s can be eliminated because the pass was not thrown backward.
C)The solution 2.7 s can be eliminated because the pass was thrown backward.
D)The solution 2.7 s can be eliminated because a ball cannot be in the air for that long due to gravity.

nnesha · Answer

t represent what in the equation ?

dedi · Answer

uhm the height

nnesha · Answer

read your question :-)

dedi · Answer

ohh time

nnesha · Answer

why??

nnesha · Answer

okay tell me why t isn't height ??
are u guessing ?:
 :-)

dedi · Answer

sorry i really don't know

nnesha · Answer

so you didn't read the question ?? did you ?

nnesha · Answer

""The height of the football at time t is modeled by the equation h(t) = –16t^2 + 40t + 7. Rounded to the nearest tenth, the solutions to the equation when h(t) = 0""

dedi · Answer

okay then the answer is

nnesha · Answer

yep so what's the answer of my question 
t= ??

nnesha · Answer

t represent what = time or height ?

dedi · Answer

time

nnesha · Answer

t= time 
 The height of the football at" time t" is 
and next sentence  h(t) = 0
that's mean you have to replace h(t) = 0 
so then you have to solve for which variable ?

dedi · Answer

the unknown variable

nnesha · Answer

:P nope okay replace h(t) by 0 
how would you write that equation after replacing h(t) by 0 ? :-)