Answer: [tex]2.1*10^{10}[/tex]
Step-by-step explanation:
1. Both number are written in scientific notation, because both have the following form:
[tex]a*10^{b}[/tex]
Where a is a number between 1 and 10 (but not including 10) and the exponent b is an integer.
2. Both have the same exponent, therefore, you can subtract 3.2 and 1.1 and write [tex]10^{10}[/tex] again, as you can see below:
[tex]3.2*10^{10}-1.1*10^{10} =2.1*10^{10}[/tex]
