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Please answer these easy Pre-Cal questions, thanks

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QUESTION 7 Write the arithmetic sequence that has four arithmetic means between -2[J and 20.

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QUESTION 13 Find the sum of a geometric series with the following values: 31 = 7; r = 2 n = 8 .
0 1,785 O 2.885
O 2,990
O 3.555

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