Question

multiple-choice question which represents 0.5 in scientific notation? 5×10² 5×10⁻¹ 5×10¹ rewatch

Explanation:

Step1: Recall scientific notation rules

Scientific notation is in the form \( a \times 10^n \), where \( 1 \leq |a| < 10 \) and \( n \) is an integer. For \( 0.5 \), we need to express it as \( a \times 10^n \).

Step2: Determine \( a \) and \( n \)

We can write \( 0.5 \) as \( 5 \times 0.1 \). Since \( 0.1 = 10^{-1} \), then \( 0.5 = 5 \times 10^{-1} \).

Answer:

\( 5 \times 10^{-1} \) (the option with \( 5 \times 10^{-1} \))