Answer:
The depth of the reflector is 0.84 feet
Step-by-step explanation:
<em>(See the figure below)</em>
The equation of a parabola centered at the origin with an axis of symmetry on y-axis is:
(1)
With p the distance from the origin to the focus using p=6, the equation (1) of the parabola becomes:
(2)
Note that the point B is on the parabola, so this point should satisfy the parabola equation (2) that allow us to use the value x=4.5 to find the y value associated to it, that it is the depth (h) of the reflector:
, solving for y
Answer:
(a) Lying on both axes-
Point lying on both axes will lie on origin, so its coordinate is (0,0)
(b) Lying on x-axis and with x-coordinates 4
Since the point lies on x-axis so its y-coordinate is 0, so its coordinate is (4,0)
(c) Lying on y-axis and y-coordinates -3
Since the point lies on y-axis so its x-coordinate is 0, so its coordinate is (0,-3)
The answer is 6 do not add the x or -
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there would be 4 students
5 cookies for each
10 slices of pizza for each
hope this helps
