A good answer might be:

No. Remember from the last chapter that 0.1 can't be represented precisely in binary. Using floating point representation does not change anything. It does not matter that the number is negative.

-0.1

But let us proceed to see how -0.1 is (imprecisely) represented.

The sign bit of -0.1 is 1 (for negative).
The binary fraction for 0.1 (from the previous chapter is)
0.0001100110011001100110011001100...
The mantissa of 0.1 is:
- Shift the leading bit into the one's place: 1.100110011001100110011001100...
- The shift was 4 places left, for an exponent of -4
- Drop bit in the one's place: .100110011001100110011001100...
- Retain 23 bits: 100 1100 1100 1100 1100 1100
The actual exponent is -4
The biased exponent is 127-4 = 123 = 0111 1011

QUESTION 20:

Here are the bits written out:

+-	exponent								Mantissa
1	0	1	1	1	1	0	1	1	1	0	0	1	1	0	0	1	1	0	0	1	1	0	0	1	1	0	0	1	1	0	0

Write out the bit pattern as hexadecimal.