Solve using differential equation methods. The temperature outside is currently 68 degrees. A 120-degree beverage is taken outside. It drops down to 100 degrees after 10 minutes. How long will it take it to reach 90 degrees?

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A: The complete solutions are given below  

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A: Part (b)

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A: Let us solve the reasoning in the next steps.

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A: This is a problem of function.

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Q: 7 5 А B с в

A: From the plurality method as, the first vote winner as, A=7, C=6, B=5, Here, A is winner.  

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A: This is a problem of Heaviside function. It has application in Laplace transform.

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