Chapter 7 - Exponents and Exponential Functions - 7-1 Zero and Negative Exponents - Practice and Problem-Solving Exercises - Page 422: 51

The answer is $10^{-1}$

To write $\frac{1}{10}$ in the form with the power of 10 and the negative exponent, we can change the equation and bring the 10 to the numerator, and since 10 has an exponent of 1 as $10^{1}$=10, the exponent changes from positive 1 to negative 1. $\frac{1}{10}$ = $10^{-1}$