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What value of n makes √10-3n = 7 true? Is every second past is like the past ze spend? What is the scientific name for human ? Find the sum to n terms of the series, 2+4(1/5)+6(1/5)²...,and deduce the sum to infinity.? A 500 mL sample of water is found to contain 0.02 g of Pb. What is the concentration of Pb in the solution?