Chapter 4.1, Problem 80PE

For Exercises 79-82, assume that the Earth is approximately spherical with radius $3960\text{ mi}$ . Approximate the distances to the nearest mile. (See Example 8)

Rochester, New York $\left(43.2°\text{N},77.6°\text{W}\right)$ , and Richmond, Virginia $\left(37.5°\text{N},77.5°\text{W}\right)$ , have approximately the same longitude, which means that they are roughly due north-south of each other. Use the difference in latitude to approximate the distance between the cities.