Answer
$52,100$
Work Step by Step
To convert a number in scientific notation, $a \times 10^{n}$, to standard decimal form:
(i) If $n$ is positive, move the decimal point $n$ places to the right; or
(ii) If $n$ is negative, move the decimal point $|n|$ places to the left.
The given scientific notation has $n=4$.
Thus, move the decimal point 4 places to the right to obtain:
$(5.21)(10^4)=52,100$
