The heights of 1 women students at eastern college are known to be normally distributed, with a mean of 67 inches and a standard deviation of 3 inches. how many women would you expect to be shorter than 5 ft 1 inch?

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?

Which of the following circles have their centers in the third quadrant? check all that apply.

The focus of a parabola is (-4,-5) and its directrix is y=-1 find the equation