Q: If 1/z2 = 4/25, then what is z?
UNANSWERED.
The correct answer is D.
A: The answer is 5/2.
1/z2 = 4/25 Cross-multiply 1 × 25 = z2 × 4 25 = 4z2 z2 = 25/4 Take the square root of both sides z = √ (25/4) = √ 25 / √ 4 = 5/2