1) a group of 22 students need to form a line of exactly 9 students. student a and student b need to be either the fifth or sixth in line.
is this arrangement of students a permutation or combination? justify your selection.

The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whale’s head is 1⁄3 of the length of its body. a new baby whale is 1⁄4 the length of a grown whale. the average man is 1⁄17 the length of a blue whale, and 1⁄1,818 its weight. a human baby measures 1⁄4 of the length of an adult. calculate the following information: how long is a whale’s head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound