Answers

2015-01-24T14:29:50+05:30
In words: 24 could be called "2 to the fourth power" or "2 to the power 4" or simply "2 to the 4th". Exponents make it easier to write and use many multiplications.
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2015-01-24T15:19:36+05:30

The exponent of a number says how many times to use the number in a multiplication.

In 82 the "2" says to use 8 twice in a multiplication, 
so 82 = 8 × 8 = 64

In words: 82 could be called "8 to the power 2" or "8 to the second power", or simply "8 squared

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