Fifteen minutes after a furnace is turned on, the temperature in a room reaches 22°C and the furnace turns off. It takes two minutes for the room to cool to 16°C and two minutes for the furnace to bring it back to 22°C as shown in the following table. Time (min) 15 16 17 18 19 20 21 22 23 Temperature (°C) 22 19 16 19 22 19 16 19 22 Assuming that the temperature (after time 15) is a sine function of the time, find the function and graph it.

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Power Operation

Power operation is topic of algebra in Math. It is use to represent repeated multiplication. Very big number and very small number can be easily express using power operation. Power operation is useful in many fields. In space engineering, it helps in representing the distance or size of particular heavenly body. In medical field, it is used to represent very small size. In medical field it helps to mention size of bacteria or virus. 

Exponents

The exponent or power or index of a variable/number is the number of times that variable/number is multiplied by itself.