Chapter 5 Polynomials and Polynomial Functions - 5.1 Use Properties of Exponents - 5.1 Exercises - Skill Practice - Page 333: 19

$$9.261 \times 10^{-12}$$

We know that scientific notation is: $a*10^b$, where $a$ must be between 1 and 10. Thus, we first multiply the two numerical values and the two values raised to a power. If the value of $a$ is between 1 and 10, we are done. If it is not, we must change the value of $b$ such that the value of $a$ is between 1 and 10. Doing this, we find: $$9.261\times10^{-4+(-4)+(-4)}\\ 9.261 \times 10^{-12}$$