Answer:
A. 12 mm
Step-by-step explanation:
a million (milimeter) is smaller than a hundred (centimeter)
I would express it verbally as “number 2 times the sum of an unknown x and number 4. you can say “ double the sum of an unknown x and number 4
Answer:
![\text{Equation of parabola is }y^2=-12x](https://tex.z-dn.net/?f=%5Ctext%7BEquation%20of%20parabola%20is%20%7Dy%5E2%3D-12x)
Step-by-step explanation:
We need to find the equation of parabola using given information
- Vertex: (0,0)
- Open to the left
- Focal width = 12
If parabola open left and passes through origin then equation is
![y^2=-4ax](https://tex.z-dn.net/?f=y%5E2%3D-4ax)
Focal width = 12
Focal width passes through focus and focus is mid point of focal width.
Focus of above parabola would be (-a,0)
Passing point on parabola (-a,6) and (-a,-6)
Now we put passing point into equation and solve for a
![6^2=-4a(-a)](https://tex.z-dn.net/?f=6%5E2%3D-4a%28-a%29)
![a=\pm 3](https://tex.z-dn.net/?f=a%3D%5Cpm%203)
a can't be negative.
Therefore, a=3
Focus: (-3,0)
Equation of parabola:
![y^2=-12x](https://tex.z-dn.net/?f=y%5E2%3D-12x)
Please see the attachment of parabola.
![\text{Thus, Equation of parabola is }y^2=-12x](https://tex.z-dn.net/?f=%5Ctext%7BThus%2C%20Equation%20of%20parabola%20is%20%7Dy%5E2%3D-12x)
The answer is d. Because it is the same on both sides
Answer:
8.1
Step-by-step explanation: