After the contents of a package of JELL-O are combined with boiling water, the mixture is placed in a refrigerator whose temperature remains a constant 39°F. Estimate the number of hours t that it will take for the JELL-O to cool to 52°F using the formula 52 - T, In 200 - T, t = - 0.9 where T, is the temperature of the refrigerator. (Round your answer to one decimal place.) t = hr

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