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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 = \(\frac{5}{2}\)
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Correct Answer: Option A
Explanation

(0.25)\(^y\) = 32

2\(^{-2y}\) = 3\(^{2}\)

2 - 2y = 5 

y = - \(\frac{5}{2}\) 


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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995