1. If r varies directly as s and inversely as the square of u_, and r=2 when s=18 and u=2 find:: a. rwhen u=3 and s=27 b.swhen u=2 and r=4 c.uwhen r=1 and s=36 2. p varies directly as q and the square of r and inversely as s.. a. Write the equation of the relation.. b. Find k if p=40 when q=5 r=4 and s=6 c. Find p when q=8 r= 6 and s=9 d. Find s when p=10 q=5 and r=2