BECE Mathematics 2023 Paper

Concept:Standard form expresses a number as $a \times 10^n$, where $1 \le a < 10$ and $n$ is an integer.Explanation:For standard form, place the decimal point immediately after the first non-zero digit.In $0.01723$, the first non-zero digit is $1$, so write the number as $1.723$.The decimal point moves $2$ places to the right to change $0.01723$ into $1.723$.Moving the decimal point to the right gives a negative power of $10$.Hence, $0.01723 = 1.723 \times 10^{-2}$.Answer:C. $\;\; 1.723 \times 10^{-2}$