In this problem, we are asked to **round off 70.427** into **3 significant numbers**.

Recall that in determining the number of significant numbers, we following the following rules:

**All nonzero digits**are significant.**Zeroes between nonzero digits**are significant.**Zeroes to the left of the nonzero digits**are, their only purpose is to indicate placement.**not significant****Zeroes to the right of the nonzero digits**are categorized as follows:**Trailing zeroes after a decimal point**are significant.**Trailing zeroes before the decimal point and after a nonzero digit**are always significant.**Trailing zeroes before an implied decimal point is ambiguous**and should be avoided by using**scientific notation.**

Round off the following quantities to the number of significant figures indicated in parentheses.

70.427 g (3)