A parabola whose vertex is at the origin has parameter p = 6. Find the focus F and the
equation of the directrix d, given that the axis of
the parabola lies along the x-axis and the focus is
on the positive side of this axis.

answer: the best estimate of the mean of the population = 14.

step-by-step explanation:

given: sheri surveyed eighty students, then generated three random samples of twenty-five student responses.

the sample mean=

⇒ the sample mean=

hence, the best estimate of the mean of the population = 14.

.16 as a fraction equals 4/25 and you cant simplify that so i'm pretty sure this is the answer

i answered the other one