It takes 15 minutes for a 100° C object to cool to 80° C in a room at 30° C. How much longer will it take to cool down to 50° C?

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Q: It took 14 sec for a mercury thermometerto rise from -19°C to 100°C when it was taken from a freezer…

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Q: It takes 15 minutes for a 100° C object to cool to 65° C in a room at 30° C. How much longer will it…

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.