21 A small cube and a large cube with edge lengths represented by expressions are shown in the diagram below. (a) x inches 3x inches The small cube has a volume of 64 cubic inches. Part A What is the value of æ? Show or explain how you got your answer.

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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.