Question

The body of a person who weighs 50 kilograms contains around 2 × 10^2 grams of sodium chloride. How much sodium chloride is contained in the bodies of 1.8 × 10^3 people who each weigh 50 kilograms? Represent the answer in scientific notation

A. 

3.6 × 10^5 grams B.  1.1 × 10^1 grams C.  36 × 10^5 grams D.  11 × 10^1 grams

Answer 1

Answer is A.
`3.6*10^(5)`

Explanation:

Mass of Sodium Chloride in one 50kg person =
`2*10^(2)` grams

Mass of Sodium Chloride in
`1.8*10^(3)` 50kg people =
`2*10^(2)` *
`1.8*10^(3)`

=
`(1.8*10^(3))*(2*10^(2))`

=
`3.6*10^(5)`

So the Answer is A.