4 log 1612 Using the color(blue)law of logs color(red)(|bar(ul(color(white)(aa)color(black)(log_b a=nhArra=b^n)color(white)(aa)14 Explanation: Remember that displaystyle{16}={2}^{{4}} : displaystyle{{log}_{{16}}{left({2}rht)}}={{log}_{{16}}{left({16}^{{frac{{1}}{{4}}}}rht)}}=frac{{1}}{{4}}