Answer: 8250 or 8.25x10^3 (in standard form)
Step-by-step explanation: Step1 - Do each of the brackets first so, (2.5x10^2) = 250 because you are moving the decimal point up by 2 units (x100 = x10^2).
Step2 - apply the same onto the other bracket so, (3.3x10^1) = 33 because you are moving the decimal point up by 1 unit (x10 = x10^1).
Step3 - because the brackets are next to eachother without any signs in between them we apply multiplication so, 250 x 33 = 8250. Note: you can either leave your answer like this or put it back into standard form depending on what the question asks you to do.
If asked to put the answer 8250 back into standard form then you would get 8.25 x 10^3 remembering the number infront of the multiplier has to be between 1 and 10.
Hope this helps!