<PRE><B>Question 865341</B>
Write a specific formula to describe the variation: S varies jointly with the inverse of the cube root of P and inversely with the square root of L; 
------------
S = k/[P^(1/3)*L^(1/2)]
==================

S = 2 when P = 8, L = 25.
2 = k/[2*5]
k = 20
------
S = 20/[P^(1/3)*L^(1/2)]
==========================
Cheers,
Stan H.
--------------------------
</PRE>