Distance Between Two Cargo Ships Ship A leaves port sailing north at a speed of...

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Distance Between Two Cargo Ships Ship A leaves port sailing north at a speed of 20 mph. A half hour later, Ship B leaves the same port sailing east at a speed of 35 mph. Let t (in hours) denote the time ship B has been at sea.(a) Find an expression in terms of t giving the distance D between the two cargo ships.D(t) =(b) Use the expression obtained in part (a) to find the distance (in miles) between the two cargo ships 4 hr after Ship A has left port. (Round your answer two decimal places.)

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