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Use the ratio test to determine whether the series is convergent or divergent.

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Find the value of the cosine for angle a

What is the anwers for 9+2x=5x-3-x