- #1

Cosmophile

- 111

- 2

## Homework Statement

"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?"

## Homework Equations

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)

**13**240780 + 265016 =

**13**515795

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?