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How do you solve #8.2^(n-3)=42.5#?

1 Answer

Oct 27, 2016

#n=ln42.5/ln8.2 +3 ~~4.78#

Explanation:

#8.2^(n-3) = 42.5#

#ln 8.2^(n-3)=ln 42.5#

#(n-3) ln 8.2=ln 42.5#-Use the property #ln x^n=n* ln x#

#n-3= ln42.5/ln8.2#

#n=ln42.5/ln8.2 +3 ~~4.78#

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