A calculator answer of 423.6059 must be rounded off to three significant figures. What answer is reported?
The answer that should be reported, rounded off to three significant figures, is 424.
To round off 423.6059 to three significant figures, we need to look at the digit in the fourth place. Since it is a 5 or greater, we round up the previous digit.
The third significant figure is 3, and the digit in the fourth place is 6. Therefore, we round up 3 to 4.
The reported answer, rounded to three significant figures, is 424.