If (0.25)\(^y\) = 32, find the value of y.
MATHEMATICS
WAEC 2019
If (0.25)\(^y\) = 32, find the value of y.
- A. y = - \(\frac{5}{2}\)
- B. y = -\(\frac{3}{2}\)
- C. y = \(\frac{3}{2}\)D. y = \(\frac{5}{2}\)
Correct Answer: A. y = - \(\frac{5}{2}\)
Explanation
(0.25)\(^y\) = 32
2\(^{-2y}\) = 3\(^{2}\)
2 - 2y = 5
y = - \(\frac{5}{2}\)
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