At noon, ship a is 130 km west of ship b. ship a is sailing east at 30 km/h and ship b is sailing north at 15 km/h. how fast is the distance between the ships changing at 4: 00 pm?

T = 4 hrs d = 100 km d = 60 km II. The two end point and the starting point (A) is a right triangle, After an hour, one end point (B) is 56mi/h the other (C) is 42mi/h. Apply the the Pythagorean formula

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