Which is the equation of a parabola with a directrix at y = -3 and a focus at (5, 3)?

a. y=1/12(x-5)²
b. y=-1/12(x-5)²
c. y=1/12(x+5)²
d. y=-1/12(x+5)²

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.