The answer would be B) log4 1024 = x
The logarithmic form can be explained as
[tex] log_{A} [/tex] B=C -----> A^C=B
Using A^C=B to the question (4^x=1024) will result
A=4
B=1024
C=x
If you put the variable into logarithmic form
[tex] log_{A} [/tex] B=C
[tex] log_{4} [/tex] 1024= x
