Geographers use negative numbers to represent points below sea level and positive numbers to represent points above sea level. A penguin dove 6 meters below sea level to catch dinner for his kids, who are sitting on an Iceberg 11 meters above sea level.
What is the difference in elevation between the penguin and his kids?
5 meters
B 6 meters
10 meters
D 17 meters

Assume that females have pulse rates that are normally distributed with a mean of mu equals 72.0 beats per minute and a standard deviation of sigma equals 12.5 beats per minute. complete parts (a) through (c) below. a. if 1 adult female is randomly selected, find the probability that her pulse rate is between 65 beats per minute and 79 beats per minute. the probability is? b. if 16 adult females are randomly selected, find the probability that they have pulse rates with a mean between 65 beats per minute and 79 beats per minute. the probability is? c. why can the normal distribution be used in part (b), even though the sample size does not exceed 30?