Answer:
0.065 g
Explanation:
Given: 0.0645
Round the given decimal to 2 significant figures.
Round: To reduce the decimal digits which changes last digits.
If digits greater than 5 then previous digits increase by 1
If digit less than 5 then no change in last digit.
Round of 2 decimal place: Write two digits after decimal.
Significant figure: The number of digits from first digits 1 to 9 .
In the given decimal number. Number of digits after decimal is 4 and significant is 3
0.0645 Round off to 2 significant number.
0.0645 ⇒ 0.065 g
The unit of number doesn't change.