2. 83 R 2
3. 82 R 1111 etc
Answer:
The answer is 3.2
Step-by-step explanation:
Answer:
dont lie, thats only 5 points
First off, you really don't need to write "what percent???" here.
25% of 80 is 0.25(80) = 20.
Refer to the diagram shown below. It shows a vertical cross-section of the paraboloid through its axis of symmetry.
Let the vertex of the parabola be at the origin. Then its equation is of the form
y = bx²
Because the parabola passes through (18,8), therefore
8 = b(18²)
b = 0.02469
The parabola is y = 0.02469x².
The receiver should be placed at the focal point of the paraboloid for optimal reception.
The y-coordinate of the focus is
a = 1/(4b) = 1/0.098765 = 10.125 in
Answer: The receiver is located at 10.125 inches from the vertex.