Question

1. Which of the numbers below are correctly written in scientific notation?(there may be more than one answer)1 point4.51x10-231.5x102O aOb0.789x103.008x10-8

Answer 1

A number is said to be in standard form when it is written as a product of a number between 1 and 10 and a power of 10.

From the given options, the following are written correctly in standard form.

$\begin{gathered} 4.51\times10^{-2} \\ 3.008\times10^{-8} \end{gathered}$

These are not written correctly in standard form.

$\begin{gathered} 31.5\times10^2\text{ (31.5 is not between 1 and 10)} \\ 0.789\times10^5\text{ (0.789 is not between 1 and 10)} \end{gathered}$