Question

Given that 22 is not a measured number and 1.4 is a measured number, for which of the following problems does the answer contain 3 significant figures?A.22 multiply by 1.4B.22 divided by 1.4C.22 added to 1.3D.More than one responseE.None of the above

Answer 1

Answer:

$Option\Rightarrow D$

Explanation: We need to find all 3 significant figure answers.

$\begin{gathered} A\Rightarrow22\times1.4=30.8\rightarrow\text{ 3 significant figure answer} \\ B\Rightarrow\frac{22}{1.4}=15.714285714\rightarrow\text{ Several significant figures} \\ C\Rightarrow22+1.3=23.3\rightarrow\text{3 significant figure answer} \\ \end{gathered}$

As we have seen that three significant answers is in two of the given option, therefore, the answer is:

$D\text{ }\Rightarrow\text{ More than one answer}$