Mathematics, 19.11.2020 19:10 ieshaking28

A baker uses chocolate with 75% cocoa for his famous cake. But his supplier delivered 100 lb of chocolate with 70% cocoa, so the baker needs to melt and mix the delivery with chocolate that has 90% cocoa. How much of the 90% chocolate should he use?

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A baker uses chocolate with 75% cocoa for his famous cake. But his supplier delivered 100 lb of choc...

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