if log 2 = 0.3010 and log 3 = 0.4771 , the value of log 5 512 is :
"log 5 512 = log 512 / log 5 = log 2 ^ 9 / log ( 10 / 2 ) = 9 log 2 / log 10 - log 2 = ( 9 * 0.3010 ) / 1 - 0.3010 = 2.709 / 0.699 = 2709 / 699 = 3.876 answer c"
multiply(0.3010, divide(0.3010, 0.4771))