Question
80.09 * β144.05+ ? * β224.87 = (2109.09 Γ·
β1368.79) * 19.89 Direction(Q1-5): Β What approximate value should come in the place of (?) in the following question?Solution
80.09 * β144.05+ ? * β224.87 = (2109.09 Γ· β1368.79) * 19.89 80 * β144 + ? * β225 = (2109 Γ· β1369) * 20 960 + ? * 15 = 1140 ? = 180/15 ? = 12
A decibel is β
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