Suppose one of the global positioning system satellites has a speed of 4.42km/s at perigee and a speed of 3.64km/s at apogee. if the distance from the center of the earth to the satellite at perigee is 2.24×104 , what is the corresponding distance at apogee?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?