Step-by-step explanation:
The equation of a parabola with focus at (h, k) and the directrix y = p is given by the following formula:
(y - k)^2 = 4 * f * (x - h)
In this case, the focus is at the origin (0, 0) and the directrix is the line y = -1.3, so the equation representing the cross section of the reflector is:
y^2 = 4 * f * x
= 4 * (-1.3) * x
= -5.2x
The depth of the reflector is the distance from the vertex to the directrix. In this case, the vertex is at the origin, so the depth is simply the distance from the origin to the line y = -1.3. Since the directrix is a horizontal line, this distance is simply the absolute value of the y-coordinate of the line, which is 1.3 inches. Therefore, the depth of the reflector is approximately 1.3 inches.
Answer:
There are 10 hours and 45 minutes until the bus leaves.
Answer: x = 3, y = 3.
Step-by-step explanation:
The decision on a photo
For this case we can model the problem as a rectangle triangle.
We know:
Length of the hypotenuse
Angle between the base of the triangle and the hypotenuse.
We want to know:
Length of the base.
For this we use the following trigonometric relationship:

Clearing x we have:

Rounding to the nearest tenth of a meter:
Answer:
The horizontal distance she has covered is:
Answer:

Step-by-step explanation:
Given
Data: 865 1010 655 565 1465 1110 710 765 820 1310 555 1065
Required
Determine the range
Range is calculated as thus:

From the data,



