Question

lesson 2: scientific notation
converting standard notation to scientific notation
which of the following is 0.00023 converted to scientific notation?
a. 23 · 10^4
b. 2.3 · 10^ - 4
c. 0.23 · 10^1
d. 2.3 · 10^ - 5
check answer

Explanation:

Step1: Recall scientific - notation form

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

Step2: Convert 0.00023

To convert 0.00023 to scientific notation, move the decimal point 4 places to the right to get a number between 1 and 10. So, $0.00023 = 2.3\times10^{- 4}$.

Answer:

B. $2.3\times10^{-4}$