We have that <span>Log3 a/3 </span>Rewrite log3(a/3) using the change of base <span>formula
we know that </span>The change of base rule can be used if a and b are greater than 0 and not equal to 1, and x is greater than 0<span>. </span>so loga(x)=<span>logb(x)/<span>logb<span>(a) </span></span></span>Substitute in values for the variables in the change of base <span>formula </span> in this problem b=10 a=3 x=a/3
