CALCULUS HELP Find the slope of the tangent line to the ellipse x216+y24=1 at the point (x, y). slope = Are there any points where the slope is not defined? (Enter them as comma-separated ordered-pairs, e. g., (1,3), (-2,5). Enter none if there are no such points.) slope is undefined at

Name the most appropriate metric unit for each measurement like the mass of cow

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

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?