What is the range in monthly rainfall over the last six months?
feb = 47mm
mar = 54mm
april = 42mm
may = 58mm
june = 61mm
july = 57mm

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?

If 20% of a number is 35, what is 50% of that number?

The area of a circle is equal to 1 dm². find the radius of the circle.