Question

convert a variable number of miles n to feet. write an expression for the unit conversion.
n miles = \frac{n miles}{1} \cdot \frac{\square ft}{1 mile}=\square ft

Explanation:

Step1: Recall conversion factor

We know that 1 mile = 5280 ft.

Step2: Perform unit - conversion

$n$ miles = $\frac{n\text{ miles}}{1}\cdot\frac{5280\text{ ft}}{1\text{ mile}}=5280n$ ft.

Answer:

$5280n$