To answer this question, we have that:
1. There are 1.3 x 10⁵ cells in a petri dish.
2. Each cell is approximately 2.8 x 10^-6 m per cell.
Then, we need to multiply each number as follows:
[tex](1.3\cdot10^5\text{cells)}\cdot(2.8\cdot\frac{10^{-6}m}{\text{cell}})=1.3\cdot2.8\cdot10^5\cdot10^{-6}m=3.64\cdot10^{5-6}m=3.64\cdot10^{-1}m[/tex]
Therefore, we have that the cells combined are 3.64*10^-1 or
[tex]3.64\cdot10^{-1}m[/tex]
(Option A.)
