Using the rules for significant figures, what do you get when you multiply 67.6 by 1.2?

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Answer 1 · 2016-08-26T17:47:02

$67.6xx1.2=81.12~=81$

Using the rule of significant figures, the result will be as follows:

$67.6xx1.2=81.12$

$underbrace(67.6)_(color(red)("3 s.f."))$

$underbrace(1.2)_(color(green)("2 s.f."))$

$underbrace(81.12)_(color(blue)("4 s.f."))$

The answer should have as many significant figures as the lowest number used in the multiplication, which is $1.2$ .

Thus, the answer should have only two significant figures:

$67.6xx1.2=81.12~=underbrace(81)_(color(green)("2 s.f."))$