25 An 8-bit computer uses 2's complement to store negative numbers. The range of numbers that can be

stored in this computer is ...

A) from - 256 to + 256

B) from - 127 to + 127

C) from - 255 to + 256

D) from - 128 to + 127

E) none of the above.

-128 to + 127

Explanation:

8-bits = 2⁸ = 256 possible values

Half of those will be positive and the other half will be negative.

So 128 positive number and - 128 negative numbers. But we must also include

the value 0, so now the range will be from - 128 to 127