To order the numbers, we write them in the following way:
[tex]\begin{gathered} 9.9\times10^{-15}=\frac{9.9}{10^{15}}, \\ 7.6\times10^{-15}=\frac{7.6}{10^{15}}, \\ 1.01\times10^{-14}=\frac{1.01}{10^{14}}=\frac{1.01\times10}{10^{14}\times10}=\frac{10.01}{10^{15}}\text{.} \end{gathered}[/tex]
We have rewritten each number as a number divided by 10^15. Because now we have three different numbers with the same denominator, we must order them by looking at the numerator.
Answer
The numbers ordered from least to the greatest are:
[tex]\begin{gathered} 7.6\times10^{-15}=\frac{7.6}{10^{15}}, \\ 9.9\times10^{-15}=\frac{9.9}{10^{15}}, \\ 1.01\times10^{-14}=\frac{10.01}{10^{15}}\text{.} \end{gathered}[/tex]
