Chapter 2 - Section 2.6 - Scientific Notation - Exercises - Page 127: 80

$$2.04\times 10^{-21}.$$

We have $$\left(\frac{ 9.6\times 10^{-3} }{(2.45\times 10^{-4})(1.1\times 10^5)}\right)^6=\left(\frac{ 9.6\times 10^{-3} }{2.695\times 10}\right)^6\\ =(3.562\times 10^{-4})^6 =2042.507\times 10^{-24}\\ =2.04\times 10^{-21}.$$