Answer:
To find out James's walking speed in miles per hour, he should calculate the distance he walks in one minute and then convert it to miles per hour. Here's the calculation he should use:
1. Calculate the distance walked in one minute:
Number of steps per minute * Length of each step = Distance walked in one minute
120 steps/minute * 2.75 feet/step = Distance walked in one minute in feet
2. Convert the distance from feet to miles:
(Distance walked in one minute in feet) / (5280 feet/mile) = Distance walked in one minute in miles
3. Finally, convert the distance walked in one minute to miles per hour:
(Distance walked in one minute in miles) * (60 minutes/hour) = Walking speed in miles per hour
This calculation will give James his walking speed in miles per hour, taking into account the number of steps he takes per minute and the length of each step.