Given:
a.) Ishi walked a total of 2 1/2 miles on a treadmill.
b.) He walked at a constant rate of 4 miles per hour.
For us to be able to determine how long, in minutes, Ishi walked on the treadmill, we will be using the following formula:
[tex]\text{ Total distance Ishi walked }\div\text{ Constant rate x Equivalent in minutes}[/tex]
We get,
[tex]\text{ 2 }\frac{1}{2}\text{miles }\div\text{ 4 }\frac{\text{miles}}{\text{ hour}}\text{ x }\frac{\text{ 60 minutes}}{1\text{ hour}}[/tex]
Therefore, the answer is letter B.
