Why is the last step of pythagorean theorem to square root the number?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Arecipe calls for 32 fluid ounces of heavy cream.how many 1 pint containers of heavy cream are needed to make the recipe?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have