- What is the widest river in the United states?

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Is every second past is like the past ze spend? Let f(x) be a function satisfying f'(X)=f(x) and f(0)=2 then ∫f(X)/3+4f(x) dx is? F(x, y) = sin(2y/x) and u is unit vector in direction (1, 2).? Can a colonoscopy detect Colon hernia,
Colon ischemia, Intussusception/Volvulus, and Ulcerative colitis? Only doctors & specialists please!? The half life of a radioactive element is 20 years. What percent of an initial amount of this element will remain after 40 years ?