Answer:
should be 112
Step-by-step explanation:
You take both 12 and 14 and multiply. Then, take 8 and 7 and multiply. Take 168 and subtract 56,and there's your answer
The answer is C.379---------
1. The function
![h(t)=-16t^{2}+48t](https://tex.z-dn.net/?f=h%28t%29%3D-16t%5E%7B2%7D%2B48t)
is a parabola of the form
![ax^{2}+bx](https://tex.z-dn.net/?f=ax%5E%7B2%7D%2Bbx)
. The the formula for the axis of symmetry of a parabola is
![x= \frac{-b}{2a}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-b%7D%7B2a%7D%20)
. We can infer from our function that
![a=-16](https://tex.z-dn.net/?f=a%3D-16)
and
![b=48](https://tex.z-dn.net/?f=b%3D48)
, so lets replace those values in our formula:
![x= \frac{-b}{2a}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-b%7D%7B2a%7D%20)
![x= \frac{-48}{-2(16)}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-48%7D%7B-2%2816%29%7D%20)
![x= \frac{-48}{-32}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-48%7D%7B-32%7D%20)
![x= \frac{3}{2}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B3%7D%7B2%7D%20)
![x=1.5](https://tex.z-dn.net/?f=x%3D1.5)
We can conclude that to the left of the line of symmetry the ball is reaching its maximum height, and to the right of the line of symmetry the ball is falling.
2. Lets check how much time the ball takes to reach its maximum height and return to the ground. To do that we are going to set the height equal to zero:
![0=-16t^{2}+48t](https://tex.z-dn.net/?f=0%3D-16t%5E%7B2%7D%2B48t)
![-16t(t-3)=0](https://tex.z-dn.net/?f=-16t%28t-3%29%3D0)
![t=0](https://tex.z-dn.net/?f=t%3D0)
or
![t-3=0](https://tex.z-dn.net/?f=t-3%3D0)
![t=0](https://tex.z-dn.net/?f=t%3D0)
or
![t=3](https://tex.z-dn.net/?f=t%3D3)
From our previous point we know that the ball reaches its maximum time at
![t=1.5](https://tex.z-dn.net/?f=t%3D1.5)
, which means that <span>
it takes 1.5 seconds to reach the maximum height and 1.5 seconds to fall back to the ground.</span>
The table isn’t shown so I cant tell
Answer:
18
Step-by-step explanation:
PY =
YV
YV = 12
VY = 18