Distance between point a and point b

Name the most appropriate metric unit for each measurement like a length of an carrot

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?