Ishi walked a total of 2 1/2 miles on the treadmill a constant rate of 4 miles per hour. Which expression shows how long in minutes ishi walked on the treadmill. Answer choices: 2.5 miles × 4miles/hour × 60minutes/1 hour. 2.5 miles ÷4miles/hour÷60minutes/1hour. 2.5 miles × 4miles/hour ÷60minutes/1hour. 2.5 miles ÷ 4miles/hour × 60minutes/1 hour