The coldest temperature ever recorded in mathville was -25°f. this happened on january 30th, 1963. the normal low for that day is 26°f. how much was the difference between the normal low temperature and the record low temperature?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0)