Answer:
2.76 x 10⁹
Explanation:
Particles of dust per square foot = 2.3 x 10⁷
The size of Vic's bedroom = 1.2 x 10²
Therefore, the number of particles of dust present in the bedroom is:
[tex]=2.3\times10^7\times1.2\times10^2[/tex]We simplify our result below.
[tex]\begin{gathered} =2.3\times1.2\times10^7\times10^2 \\ =2.76\times10^{7+2} \\ =2.76\times10^9 \end{gathered}[/tex]There are 2.76 x 10⁹ dust particles.
