Answer:
[tex]\large\boxed{1.723\cdot10^{-5}=0.00001723}[/tex]
Step-by-step explanation:
[tex]a^{-n}=\dfrac{1}{a^n}\\\\b\cdot a^{-n}=b\cdot\dfrac{1}{a^n}=\dfrac{b}{a^n}[/tex]
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[tex]1.723\cdot10^{-5}=\dfrac{1.723}{10^5}=\dfrac{1.723}{100,000}\\\\\text{If you divide a number by 10, 100, 1000, ..., you must move the comma}\\\text{to the left by as many places as there are zeros. Therefore:}\\\\=\dfrac{1.723}{1\underbrace{00,000}_5}=0.\underbrace{00001}_{\leftarrow5}723[/tex]