Calculus HELP!

<p>OK I know this is for SAT preparation, but I have a very important mideast exam for calculus, and I know that since there are so many smart people on this website, one of you can answer this question! It is a calc I first-semester related rates question, so don't try to make it too confusing to read-thanks!</p>

<p>Two ships sail from the same island port, one going north at 24 knots (nautical miles per hour) and the other east at 30 knots. The northbound ship departs at 9 AM and the eastbound ship leaves at 11 AM. How fast is the distance between them increasing at 2 PM?</p>

<p>THANKS for the help everyone!</p>

<p>Use this formular to solve the problem, a^2+b^2=c^2.
Then you need to convert the deratative function.</p>