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22-07-2020
SAT

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If (4^a^-2)(4^3) = 64^2 , what is the value of a? a. 0 b. 4 c. 5 d. 7 e. 8

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25-07-2020

Answer: 1/4

Explanation:

So 4 to the power of a to the power of -2 times 64 has to equal 4096.

That means the left side has to be (64)(64) as well which makes 4 to the power of a to the power of -2 = 64

64/4 = 16

16 = 1/a^2

a = 1/4

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