A computer monitor is 20 inches wide. The aspect ratio, which is the ratio of the width of the screen to the height of the scree
n, is
16:9
What is the length of the diagonal of the screen, to the nearest whole inch?
Enter your answer in the box.
16:9
What is the length of the diagonal of the screen, to the nearest whole inch?
Enter your answer in the box.
1 answer:
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Let's solve ~
Equation of directrix is : y = 1, so we can say that it's a parabola of form : -
- h = x - coordinate of focus = -4
- k = y - coordinate of focus = 5
- a = half the perpendicular distance between directrix and focus = 1/2(5 - 1) = 1/2(4) = 2
and since the focus is above the directrix, it's a parabola with upward opening.