Question

3.2 x 104 bacteria are measured to be in a dirt sample that weighs 1 gram. Usescientific notation to express the number of bacteria that would be in a sampleweighing 21 grams.

Answer 1

The number of bacteria that weighs 1 gram are,

`3.2*10^4`

Determine the number of bacteria in a sample that weighs 21 grams.

`\begin{gathered} 21\cdot3.2*10^4=67.2*10^4 \\ =6.72*10^5 \end{gathered}`

So answer is,

`6.72*10^5`