- Which compounds will not dissolve at acdic solution pbf2, pb(cn)2,pbi2,pb3(po4)2?

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Let G be an abelian group and let k in Z^+. Define the set K = {x in G| x =a^k for some a in G}. Show that K<= G? Two questions. How many zeros are in the function. And can a function be irrational? Show that the function has exactly one zero in the given interval. f(x)= x^3 + (8/x^2) +6 (-infinity, 0)? Find the exact length of the curve. (Calculus Question)? x=1+12t^2
y=5+8t^3
0 ≤ t ≤ 2? How many milligrams of calcium is in 1 g of calcium lactate?