How do I solve this math problem?

Janice S asked: Two jets leave Dulles at 2 pm. One travels north at 850 mph and the other south at 750 mph. At what time will they be 4000 miles apart?

The truth is, I don’t even know where to begin. I tried looking it up in google, but since I didn’t even know what [...]

How do you find the area of a square whose diagonal is 32?

sean asked: i need to figure this out as soon as possible for its due in about half hour so if anyone can help me it would be greatly appreciated