Buffalo, new york, and raleigh, nc, lie approximately on the same meridian. buffalo has a latitude of 42.9° n, and raleigh has a latitude of 35.8° n. find the distance between these two cities. (the radius of the earth is 3960 mi. round your answer to the nearest mile.)

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu