Match each number to its name.

Write each expression as a multiple of a power of 10:

1. 42,300

2. 2,000

3. 9,200,000

4. Four thousand

5. 80 million

6. 32 billion

Each statement contains a quantity. Rewrite each quantity using a power of 10.

1. There are about 37 trillion cells in an average human body.

2. The Milky Way contains about 300 billion stars.

3. A sharp knife is 23 millionths of a meter thick at its tip.

4. The wall of a certain cell in the human body is 4 nanometers thick. (A nanometer is one billionth of a meter.)

A fully inflated basketball has a radius of 12 centimeters. Your basketball is inflated only halfway. How many more cubic centimeters of air does your ball need to fully inflate? Express your answer in terms of . Then estimate how many cubic centimeters this is by using 3.14 to approximate .

Solve each of these equations. Explain or show your reasoning.

Graph the line going through with a slope of , and write its equation.