Convert the 8-binary binary expansion ( 0101 1001 )? to a decimal expansion. Convert the following decimal expansion ( 124 )?? to an 8-bit binary expansion. Convert the following hexadecimal expansion ( D40 )?? to an octal expansion. Convert the following binary expansion ( 1001 1010 0101 1001 )? to a hexadecimal expansion.
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Convert the 8-bit binary expansion 0101 1001 to a decimal expansion: $0101 1001_2 = 1 \cdot 2^0 + 0 \cdot 2^1 + 0 \cdot 2^2 + 1 \cdot 2^3 + 1 \cdot 2^4 + 0 \cdot 2^5 + 1 \cdot 2^6 + 0 \cdot 2^7 = 1 + 8 + 16 + 64 = 89$ So, $0101 1001_2 = \boxed{89_{10}}$. Show more…
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