A patient receives an intravenous (IV) solution that flows at the rate of 150 mL per hour.   How much fluid does the patient receive in 20. min? (Answer = 50 mL) How long does it take for the patient to receive 90. mL of fluid? (Ans. = 0.6 hr or 36 min.) If the IV bag holds 600. mL of fluid, how many minutes does it take to empty the bag? (t = 4 hrs) If the solution contains 90. mg of glucose per mL, how long will it take to give the patient 2.0 g of glucose? (t = 0.15 hr or 9 min)

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Scientific Notation

We have to deal with quantities that are extremely large or very small. For example- I may have 6,500,000,000 red blood cells, or the diameter of an iron atom is 0.000000011 inches. Numbers with many zeros can be inexpedient to work with, so scientists use scientific notation. It represents very large numbers or very small numbers in a simple form. We know that whole numbers can be extended to infinity, but we cannot write such large numbers on paper. Numbers that present in millions of places after the decimal point need to be represented simply. Thus, it is difficult to represent a few numbers in their extended form. Therefore, we use scientific notation.