Given:
The given expression is
![10^(-3)](https://img.qammunity.org/2021/formulas/chemistry/college/7n2rslr106epow2azx867h2h0n06dei1el.png)
We need to determine the equivalent number.
Equivalent expression:
To determine the equivalent number, let us solve the expression
![10^(-3)](https://img.qammunity.org/2021/formulas/chemistry/college/7n2rslr106epow2azx867h2h0n06dei1el.png)
Thus, let us apply the exponent rule
, we get;
![10^(-3)=(1)/(10^(3))](https://img.qammunity.org/2021/formulas/mathematics/middle-school/rfuq4ive910ypfrimoipkuoy1gy0m34una.png)
Also, the term 10³ can be written as
![10^(3)=1000](https://img.qammunity.org/2021/formulas/mathematics/middle-school/z96gd12vmf79q1lc0h1pli895qgb6hn8iy.png)
Thus, we get;
![(1)/(1000)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/gc87484htuhhqwmiggdqwp18w0wb3elwl4.png)
Dividing, we get;
0.001
Hence, the equivalent number is 0.001
Hence, Option c is the correct answer.