## Thinking Mathematically (6th Edition)

We can convert 93 million miles to units of centimeters. $93,000,000 ~miles = \frac{93,000,000~mi}{1}\times \frac{5280~ft}{1~mi}\times \frac{12~in}{1~ft} \times \frac{2.54~cm}{1~in}$ $93,000,000~miles = 15,000,000,000,000~cm$ Since 1 km = 100,000 cm, we need to move the decimal place 5 places to the left to convert from units of cm to units of km. $93,000,000~miles = 15,000,000,000,000~cm = 150,000,000~km$