"A calculator displays a result as 1.3250780 x10^7 kg. The estimated uncertainty in the result is +/- 2%. How many digits should be included when the result is written?"
I'm not sure that there are any relevant equations here, aside from (maybe)
Actual result = Measured result + (Measured result)*(+/- 0.02)
The Attempt at a Solution
1.3250780x10^7 = 13250780
13250780*(0.02) = 265016 (rounding to nearest 1)
13240780 + 265016 =
Where I have bolded the numbers that do not change when the possible error is added to the measured result. Because I am only sure of these two numbers, does that mean that my number of significant figures should be 2?