Answer: Hello!
I think that 1.1 x 103 is maybe bad written, and you wanted to write 1.1x10^3, i will solve this for this last one.
We are looking for a number that his four thousand times larger than 1.1x10^3, this number is equivalent to 4000*1.1x10^3
and we know that 4000 = 4x10^3, then we are looking for:
(4x10^3)*(1.1x10^3) = (4*1.1)x10^(3 + 3) = 4.4x10^6
So the correct answer is the option C : 4.4x10^6
