Cell size and scale

Remember that small and big quantities are expressed with scientific notation. Practise this scientific notation with this link.
Using the link cell size and scale answer the questions:

• How many paramecium could hold one millimeter square?
• What is the size of red blood cell in nanometers?
• How many rhinovirus could hold a red blood cell? And a grain of rice?
• How many carbon atoms could hold one millimeter square?