- How much sunlight does North America get compared to South America?

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What's a real life Arithmetic Sequence problem and a Geometric Sequence problem? Find all solutions in the interval [0, 2π). (sin x)(cos x) = 0? #8 on a Chemistry review. Went through my notes and didn't see this example clearly.? Suppose that cos(t)=5/13 where t is in the fourth quadrant. Find sin(2t)? Calculate the Riemann sum R(f,P,C) for f(x)=x, P={1,1.2,1.6,2}, C={1.1,1.4,2}.
R(f,P,C)=?