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70% (00:48) correct
30% (00:33) wrong based on 30 sessions

\(8z^4 = 96\)

Quantity A

Quantity B

2

z

A. Quantity A is greater. B. Quantity B is greater. C. The two quantities are equal. D. The relationship cannot be determined from the information given.

Re: given 8z^4 = 96 [#permalink]
22 Apr 2018, 14:05

1

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Expert's post

Explanation

Divide both sides by 8 to get \(z^4 = 12\). Rather than finding the fourth root of 12, try plugging in 2 for z: \(2^4 = 16\), so z must be less than 2. Of course, z may be negative, but any negative number is also less than 2.

Hence option A is correct! _________________

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