The temperature started at 39°f. if the temperature went down 5°f and then up 7°f, whats is the temperature difference relative to the low temperature?

Write a polynomial that fits the description: a third-degree polynomial with leading coefficient -4

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?