Question

round the following measurement to the indicted number of significant figures. to enter scientific notation use the \e\ form. for example 1.25 x 10^3 = 1.25e3
3.92836 x 10^-3 ml to 2 significant figures
3.90000e - 3 x ml

Explanation:

Step1: Identify significant figures

The original number is $3.92836\times 10^{-3}$. We want 2 significant - figures. The first two digits are 3 and 9.

Step2: Round the number

Look at the digit after the second significant - figure. The digit after 9 is 2. Since 2 < 5, we do not round up. So the number rounded to 2 significant figures is $3.9\times 10^{-3}$, which in "e" form is $3.9e - 3$.

Answer:

$3.9e - 3$