A parabola can be drawn given a focus of (-7,-5) and a directrix of y = 1. Write the equation of the parabola in any form.

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81