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CONVERSION OF CFU TO MG ? I have 36 purple stones. Under florescent lights stones turned violet/bluish on a 1921 Liberty $20 gold piece, what r they? If a and b are positive integers such that gcd(a,b)=210, lcm[a,b]=210^3, and a** **What is the product of 2 x the sum of 36,46,52,43, and 48? I made a typo earlier, excuse me. I still donâ€™t understand how to do this. Find b such that f(x)=-4(x^2)+bx+3 has a maximum value of 50?