A series stack of alkaline cells produces 6 kW of power. If each cell contributes 14.5 W, how many cells are in the stack? (Round to the nearest whole number.)

Convert 6 kW to watts: 6 kW = 6,000 W. Divide the total power by the power from each cell: 6,000 ÷ 14.5 ≈ 413.8, which rounds to 414 cells. Therefore, the correct choice is 414.

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