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Base of a power
To write repeated multiplication in an exponential notation, you should write the number that has to be multiplied as the base. Count the number of times that the number is used.
3*3
7 x 7 = 49
The factors of nine are one, three, and nine. A factor is a whole number that when multiplied by another number equals the number you are factoring. So, the repeated multiplication for nine is 3 times 3.