A sheet of plastic shrink wrap has a thickness of $0.00015 \mathrm{~mm}$. The sheet is $1.2 \mathrm{~m}$ by $79 \mathrm{~m}$. Determine the volume of the sheet. Write your answer using scientific notation.

Write an equivalent expression with negative exponents.

$$\frac{1}{x^3}$$

A ream of copier paper weighs $2.25 \mathrm{~kg}$. How much does a sheet of copier paper weigh?

Solve. Be sure to check.

$$3 x-7 x=60$$

Write an equivalent expression without negative exponents and, if possible, simplify.

$$\frac{5 a^{-3} b c^{-1}}{d^{-6} f^2}$$

Intel Corporation has invented silicon-based connections that use lasers to move data at a rate of 50 gigabytes per second. The printed collection of the U.S. Library of Congress contains 10 terabytes of information. How long would it take to copy the Library of Congress using these connections?