1. Simplify the expression $\frac{y^9}{y^3}$. The result is $y$ raised to the power of ___.
2. Which expression is equivalent to the quotient $\frac{x^8}{x^2}$?
3. When the expression $\frac{k^4}{k^{11}}$ is simplified to the form $k^n$, the value of $n$ is ___.
4. Which of the following correctly simplifies the expression $\frac{p^2}{p^7}$?
5. The population of a major city is about $10^7$, while a small town has about $10^4$ people. The city's population is ___ times larger than the town's population.
6. The distance from Earth to Star X is $10^{18}$ meters, while the distance to Star Y is $10^{15}$ meters. How many times farther away is Star X compared to Star Y?
7. A computer's hard drive has $2^{33}$ bytes of memory. A large video file takes up $2^{29}$ bytes. The total memory is ___ times larger than the video file.
8. A powerful supercomputer can perform $10^{15}$ calculations per second. A standard laptop can perform $10^{11}$ calculations per second. How many times faster is the supercomputer?
9. A digital library contains $2^{50}$ bytes of data. If the average book is $2^{20}$ bytes, the library can hold ___ times the data of a single average book.