Question

which of the following numbers is written in scientific notation? 20×10^6 1.75×10^6 20 1.31 choose the correct answer below. a. 1.75×10^6 b. 20 c. 20×10^6 d. 1.31

Explanation:

Scientific notation is of the form $a\times 10^{n}$ where $1\leqslant|a|< 10$ and $n$ is an integer. Option A, $1.75\times 10^{6}$, follows this form. Option C has $a = 20$ which is not in the range $1\leqslant|a|<10$. Option B (20) and Option D (1.31) are just regular numbers not in scientific - notation form as they lack the power - of - 10 component.

Answer:

A. $1.75\times 10^{6}$