Question

Qual o valor aproximado de log 15, dados log3 ≅ 0,48 e log 5 ≅ 0,70? 

a) ≅ 2,4
b) ≅ 1,44
c) ≅ 1,19
d) ≅ 1,18
e)≅ 0,34 ​

Answer 1

$\Large\boxed{\begin{array}{l}\sf \ell og(15)=\ell og(3\cdot5)=\ell og3+\ell og5\\\sf \ell og(15)=0,48+0,70\\\sf \ell og(15)=1,18\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~d}}}}\end{array}}$