Question

25/40
1.49 × 10⁻⁷

Explanation:

Step1: Understand Scientific Notation

Scientific notation \(a\times10^{n}\) where \(1\leq|a|\lt10\) and \(n\) is an integer. Here \(a = 1.49\), \(n=- 7\). To convert to standard form, we move the decimal point \(7\) places to the left (since \(n=-7\)).

Step2: Perform the Conversion

\(1.49\times10^{-7}=\frac{1.49}{10^{7}}=\frac{1.49}{10000000}=0.000000149\)

Answer:

\(0.000000149\) (or in scientific notation \(1.49\times10^{-7}\))