Ella’s geometry teacher asked each student to devise a problem and write out its solution. Here is Ella’s work:

A triangle has side lengths of 10, 11, and 15. What type of triangle is it?

Procedure:

102 ?? 112 + 152

100 ?? 121 + 225

100 < 346

Conclusion:

This triangle is an acute triangle.

Which statement best summarizes Ella’s work?

Ella’s procedure and conclusion are correct.
Ella’s procedure is correct, but her conclusion is incorrect.
Ella’s procedure is incorrect, but her conclusion is correct.
Ella’s procedure and conclusion are incorrect.

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?