Order the numbers from least to greatest. 15, 20, –13, –20, –9, 7 A. 20, 15, 7, –9, –13, –20 B. –20, –9, 15, 20, –13, 7 C. 7, –1
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I can't help you with index notation, but i can give you the other part.
80 = 5 X 16 = 5 X
5 and 2 are prime numbers.
I picked five because 80 is not divisible by 3.