Your answer is indeed -0.542. Why do you think you have it wrong?
. . . . All of this is correct!
My answer is completely wrong.
Apparently it's -0.542
I bet you're entering it incorrectly into your calculator.
Suppose we want: .
If we enter: . ... we will get the wrong answer.
Press on your calculator.
. . On the display you will see: .log(
It automatically provides a left parenthesis in ancitipation of a longer quantity.
. . We are expected to provide the right parenthesis.
If we don't ... and we press: .
. . the calculator reads it as: .log(2 + 3 =
. . and returns: .log 5
We must enter: .
So an expression like: . should be treated like this: