<PRE><B>Question 458697</B>
The amount of oil used by a ship traveling at a uniform speed varies jointly with the distance and the square of the speed. 
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f = k*d*s^2
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Solve for &quot;k&quot; using &quot;the ship uses 200 barrels of oil in traveling 500 miles at 32 miles per hour&quot;
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200 = k*500*32^2
k = 0.0003906..
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Equation:
f = (0.0003906*d*s^2)
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Determine how many barrels of oil are used when the ship travels 320 miles at 16 miles per hour.
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f = 0.0003906*320*16^2
fuel = 32 barrels
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Cheers,
Stan H.
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