Answer
See explanations.
Work Step by Step
For a decimal, such as $0.0052$, locate the original decimal point position (after the first zero) and the first leftmost significant digit (5). Count the number of places needed to move the original decimal point to the right side of the significant digit -- positive if moving to the left and negative if to the right (n=-3 in this case). Put the decimal point after the above significant digit (5) and write the number in scientific notation as $a\times10^n$ ($5.2\times10^{-3}$ in this example) where $1\leq |a|\lt 10$.
