Question

Mary is solving the equation 2n – 3 = 83. Her first three steps are shown:

Answer 1

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2^n - 3 = 83 
2^n = 86 
ln(2^n) = ln(86) 
n*ln(2) = ln(86) 
n= ln(86)/[ln(2)] (which is the same as "log base 2 of 86") 
n= 6.426264755