Given:
Number = -9.1
To find:
The magnitude (size) of given number.
Solution:
We know that, magnitude of a number is the absolute value of that number.
So, magnitude of -9.1 is
[tex]|-9.1|=9.1[/tex]
Because, absolute value of a number is always positive.
Magnitude of -9.1 is 9.1 because [tex]|-9.1|=9.1[/tex].
Therefore, the correct option is A.