Pima invested $400 in Ethereum. In the first week, it gained 25% in value. In the second week, it gained an additional 50% on top of the previous gain. How much is her investment worth now? Let's think first. Chain of thought:
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For the first week, her investment gain is $400 * 25% = $100. This leaves her investment with a value of $400 + $100 = $500. For the second week, her investment increased by $500 * 50% = $250. Pima's investment in Ethereum is now worth a total of $500 + $250 = $750.
Therefore, the answer is 750.
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