MEDAL AND FAN!!!!!!

A model rocket launched from a roof into a large field. The path of the rocket can be modeled by the equation y=-0.8x^2+12+25.8 where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground.

How far horizontally from its starting point will the rocket land? Round your answer to the nearest hundredth.

A. 25.80
B. 37.00
C. 17.24
D. 16.91

Question

MEDAL AND FAN!!!!!!


A model rocket launched from a roof into a large field. The path of the rocket can be modeled by the equation y=-0.8x^2+12+25.8 where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground.

How far horizontally from its starting point will the rocket land? Round your answer to the nearest hundredth.

A. 25.80
B. 37.00
C. 17.24
D. 16.91

anonymous · Answer

@pooja195

anonymous · Answer

please dont explain this too hard for me pooja

pooja195 · Answer

i dont know this :( try @Nnesha

anonymous · Answer

ok....:( @Nnesha

anonymous · Answer

i mean Nnesho

anonymous · Answer

lol

nnesha · Answer

$\color{blue}{\text{Originally Posted by}}$ @Chiko_1278
MEDAL AND FAN!!!!!!

 y=-0.8x^2+12+25.8 
$\color{blue}{\text{End of Quote}}$
12 or 12x ?

anonymous · Answer

lolz

anonymous · Answer

so what the answer

nnesha · Answer

12x right ?

anonymous · Answer

look at the answer choices i dont see any 12 or 12x

nnesha · Answer

i'm not giving uthe answer :P i'm asking a question 
there is a error type something ....

nnesha · Answer

$\color{blue}{\text{Originally Posted by}}$ @Chiko_1278
MEDAL AND FAN!!!!!!


A model rocket launched from a roof into a large field. The path of the rocket can be modeled by the equation y=-0.8x^2+12+25.8 where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground.

How far horizontally from its starting point will the rocket land? Round your answer to the nearest hundredth.

A. 25.80
B. 37.00
C. 17.24
D. 16.91
$\color{blue}{\text{End of Quote}}$
look at the equation isn't that suppose to 12x ?

anonymous · Answer

lol...sowwy..yesh..thersh a 12x me bad...

anonymous · Answer

wow ur smart

nnesha · Answer

o^_^o
yep so you have to solve for x 
they are asking for  "ow far horizontally from its starting point will the rocket land"
so y =0 
replace y by 0$$\huge\rm 0 =-.8x^2 +12x +25.8$$
now you have quadratic equation 
do you know the quadratic formula ??

anonymous · Answer

nope...

nnesha · Answer

$$\huge\rm x = \frac{ -b \pm \sqrt{b^2 -4ac} }{ 2a }$$ quadratic formula
quadratic equation is $$\huge\rm \color{green}{A}x^2 + \color{green}{B}x +\color{green}{C} =0$$
now replace a b and c values then solve for x

anonymous · Answer

isnt that x suppose to be a B...???

nnesha · Answer

which one ??

nnesha · Answer

|dw:1427169112584:dw|this one ?