BECE Mathematics 2022 Paper

Concept:Standard form expresses a number as $a \times 10^n$, where $1 \le a < 10$ and $n$ is an integer.Explanation:For $1930.54$, place the decimal after the first non-zero digit, which is $1$.So the decimal part becomes $1.93054$.To change $1930.54$ into $1.93054$, shift the decimal point three places to the left.Moving the decimal point to the left gives a positive power of $10$.Therefore, the power is $+3$.Thus, $1930.54 = 1.93054 \times 10^3$.Answer:Option A: $\;1.93054 \times 10^{3}$