Homework Help: Optimization--PLEASE HELP!!!

Posted by Maria on Monday, November 21, 2011 at 9:30pm.

At t=0, ship A is 12 miles due north of ship B. Ship A travels 12 miles/hour due south, while ship B travels 8 miles/hour due east.
a. Write a function for the distance between the two ships.
b. At what time are the two ships closest?

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