Number systems

A microprocessor uses the instruction format shown for instructions that use a direct address. The amount of memory that can be accessed using direct address mode is most nearly:

A.  256 words
B.  512 words
C.  1,024 words
D.  2,048 words

Which of the following is a binary representation of the base-10 fraction $$93/128$$?

A.   0.1011100
B.   0.1011101
C.   0.1011110
D.   0.1011111