Answer: 10 CD's
Step-by-step explanation:
Given
Tom can burn a CD in [tex]\frac{4}{5}\ \text{of an hour}[/tex]
If he has 8 spare hours in the week, he can burn
[tex]\Rightarrow 8\div \frac{4}{5}=\dfrac{8}{\frac{4}{5}}\\\Rightarrow \dfrac{8\times 5}{4}=2\times 5=10\ \text{CD}[/tex]