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Maths Puzzle
Numerical Ability
rational expression need help quick
a-8/a+7
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The decibel level of sound is given by D= 10log ( I/10^−12), where I is the
sound intensity measured in watts per square meter. Find the
decibel level of a whisper at an intensity of 5.4 × 10-10 watts per
15-(5m-4) = 34