The answer is 2040 hope this helps
Answer:
40
Step-by-step explanation:
i took the test and got it right.
The last selection should be your answer
Answer:
56%
Step-by-step explanation:
votes received/total votes = %
462/825 = 0.596 = 56%
Answer:
To solve this problem, we can use a system of equations.
We know the quadratic expression has the form
![f(t)=at^{2}+bt](https://tex.z-dn.net/?f=f%28t%29%3Dat%5E%7B2%7D%2Bbt)
Using points (1,12) and (4,0), we can form the following system to find a and b.
![12=a+b](https://tex.z-dn.net/?f=12%3Da%2Bb)
![0=16a+4b](https://tex.z-dn.net/?f=0%3D16a%2B4b)
We need to divide the second equation by -4 and sum both equations
![12=a+b\\0=-4a-b](https://tex.z-dn.net/?f=12%3Da%2Bb%5C%5C0%3D-4a-b)
![12=-3a\\a=\frac{12}{-3}\\ a=-4](https://tex.z-dn.net/?f=12%3D-3a%5C%5Ca%3D%5Cfrac%7B12%7D%7B-3%7D%5C%5C%20a%3D-4)
Then, we use this value to find the other variable
![12=a+b\\12=-4+b\\b=12+4\\b=16](https://tex.z-dn.net/?f=12%3Da%2Bb%5C%5C12%3D-4%2Bb%5C%5Cb%3D12%2B4%5C%5Cb%3D16)
<h3>Therefore, the quadratic function that models the situation is</h3>
or ![f(t)=-4t(t-4)](https://tex.z-dn.net/?f=f%28t%29%3D-4t%28t-4%29)
According to this expression, after 2 seconds, the height is 16 feet.
![f(2)=-4(2)(2-4)=-8(-2)=16](https://tex.z-dn.net/?f=f%282%29%3D-4%282%29%282-4%29%3D-8%28-2%29%3D16)