How many significant figures are in the answer when you multiply 67.20 x 8.02?

Answer 1

Three. The same rule applies here: when multiplying or dividing, you can't have more sig figs in the answer than the least number of sig figs in the data. So your answer should be rounded off to 3 sig figs. So, with 8.02 having 3 sig figs (67.20 has 4), the answer of 5.389 x 10² would be reported as 5.39 x 10²