Round off to three significant digits
(i) 0.03927kg (ii) `4.085xx10^8s`

Answer

`0.393kg; (ii) 4.08xx10^8 s`

Explanation

(i) 0.0393kg (:. The last digit 7gt5)
(ii)`4.08xx10^8s`
(:. The digit to be rounded off is 5 and
percending digit is even)