Answer: There are [tex]1.2\times10^3[/tex] times more bacteria in the petri dish this week compared to last week.
Step-by-step explanation:
Given: Last week the number of bacteria in a petri dish = [tex]2.25\times10^2[/tex]
This week the number of bacteria in the petri dish =[tex]2.75\times10^5[/tex]
Now, the number of times more bacteria are in the petri dish this week will be :
[tex]\dfrac{2.75\times10^5}{2.25\times10^2}\\\\\\=\dfrac{2.75}{2.25}\times10^{5-2}\ \ \text{Since} , a^m\times a^n=a^{m+n}\\\\\\=1.22222222222\times10^3\approx 1.2\times10^3[/tex]
Hence, There are [tex]1.2\times10^3[/tex] times more bacteria in the petri dish this week compared to last week.
