Question

show what you know which is not in proper scientific notation? 5.2×10⁶ 7.1×10⁰ 0.3×10⁴ 3.0×10³

Explanation:

Step1: Recall scientific - notation rule

Scientific notation is of the form $a\times10^{n}$, where $1\leq|a|\lt10$ and $n$ is an integer.

Step2: Check each option

• For $5.2\times10^{6}$, $1\leq5.2\lt10$, so it is in proper scientific notation.
• For $7.1\times10^{0}$, $1\leq7.1\lt10$, so it is in proper scientific notation.
• For $0.3\times10^{4}$, since $0.3\lt1$, it is not in proper scientific notation. It should be $3.0\times10^{3}$ (move the decimal - point one place to the right and decrease the exponent by 1).
• For $3.0\times10^{3}$, $1\leq3.0\lt10$, so it is in proper scientific notation.

Answer:

$0.3\times10^{4}$