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.
Http://lbcsd.innersync.com/sites/jhayes/documents/U1M3Gr6pg.49-502015JHayes.pdf
In this problem, you add 21 and 29. That results in 50 and you can either:
1. Divide 29 by 50 and multiply 100. 29/50= .58 * 100= 58% or
2. Since percentage is based on 100 and the denominator is 50, multiply the top and bottom by 2 like so.
29 x 2 = 58
--- -- ----- so that makes your percentage 58.
50 x 2 = 100
Hope this is clear enough.
Hi Sebastian0113,
Your Question:
5.708 x 10^-8 in standard form
Solution:
Decimal Form:
To solve this equation just divide 5.708 by 10 8 times.
= 5.708 / 10 / 10 / 10 / 10 / 10 / 10 / 10 / 10
= 0.000000005708
5.708 x 10^-8 = 0.000000005708
Standard Form:
5.708 x 10^8
5.708 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10
= 570,800,000
Answer:
Standard Form - 570,800,000
Decimal Form - 0.0000005708
