If you want me to pick the correct answer out of a list of multiple choices for you,
then the least you could do would be to show me the list.
(00001001)2 = (9)10
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9
Assuming the 00001001 is supposed to be in binary, the decimal equivalent is 9.
7
A remainder is the numbers after a decimal point; sometimes used as repesenting in binary to get a binary number from a decimal number.
easy, 1011. in binary of course. convert 1011 binary to decimal you get 11.