Write the recommended daily dietary intake of each nutrient in scientific notation: (a) sodium, 2,400 mg; (b) vitamin B12, 0.000 006 g.

Question

Write the recommended daily dietary intake of each nutrient in scientific notation: (a) sodium, 2,400 mg; (b) vitamin [latex]B_{12}[/latex], 0.000 006 g.

Analysis
Move the decimal point to give a number between 1 and 10. Multiply the number by [latex]10^{x}[/latex], where x is the number of places the decimal point was moved. The exponent x is (+) when the decimal point moves to the left and (–) when it moves to the right.

Very large and very small numbers are more conveniently written in scientific notation.

Scientifi c Notation	Number	Quantity
[latex]2 × 10^{13}[/latex]	20,000,000,000,000	Number of red blood cells
[latex]6 × 10^{–6} m[/latex]	0.000 006 m	Diameter of a red blood cell

Accepted Answer

• Write the coefficient as 2.4 (two significant figures), since 2,400 contains two significant figures.

• Write the coefficient as 6 (one significant figure), since 0.000 006 contains one significant figure.

Question 1.SP.6: Write the recommended daily dietary intake of each nutrient ...

Related Answered Questions