There Are Other Ways of Expressing Uncertainty Besides Significant Figures

Multiple Choice

There are other ways of expressing uncertainty besides significant figures.For example,suppose a quantity is known to have a value between 20.4 and 20.0,and our best estimate of the value is midrange at 20.2.We could write the number as 20.2 +/− 0.2 and say that the number has a 1% uncertainty.We would also say it has 3 significant figures.If we square a number with 1% uncertainty and 3 significant figures,what results?

A) A number with 1% uncertainty and 3 significant figures.
B) A number with 2% uncertainty and 3 significant figures.
C) A number with 2% uncertainty and 2 significant figures.
D) A number with 1% uncertainty and 2 significant figures.