How do i convert these numbers to binary?

Question

A) 209 (base 10) using division of 2

B) 209 (base 10) using reversed positional notation

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How many decimal numbers can unsigned binary numbers represent with 3 bits ?

Answer 1

You should probably try to actually understand what you're supposed to be learning in whatever class it is you're taking, so you can do this stuff yourself.

209 - 11010001 (and the inverse)

Three bits will give you 1, 2, and 4. With it you can make the following combinations:

0
1
2
3
4
5
6
7

Answer 2

go to http://www.paulschou.com/tools/xlate/


i think base 10 is x