Assume the parabola is placed on a graph where the x-axis is the top of the dish.
The vertex is then at (0,-30) The x-intercepts or zeros are at (-30,0) and (30,0)
The equation of such parabola would be:

Plug in vertex to find value of 'a'

Now find the focus given that


Answer: the microphone should be placed 7.5 inches from vertex.
Answer: Canada Vegetation
Forests are primarily mixes of white and black spruce, lodgepole pine, balsam poplar, paper birch and trembling aspen. Common understorey plants include mountain and green alders, highbush cranberry, wild rose, Canadian buffalo berry and reed grass, fireweed, lingonberry, twinflower and feather mosses.
Answer:
give the full questions please
The distance formula is sqare root (x-x)^2+(y-y)^2 and then you will plug in
sqrt(8+13)^2+(4+5)^2
plug that in to your calculator and that will be your answer what ever you get
1. 8
2. 9
3. 11
4. 8
5. 10
6. 7
7. 4
8. 11
9. 4
10. 10
11. 16
12. 10
13. 22
14. 3
15. 16