In a table used to convert from decimal to binary, the top row would typically represent the powers of 2, because binary is a base-2 numbering system. The powers of 2 would be:
- \(2^0\) (which equals 1)
- \(2^1\) (which equals 2)
- \(2^2\) (which equals 4)
- \(2^3\) (which equals 8)
- \(2^4\) (which equals 16)
- And so on.
Given the options you provided:
- 1 (which is \(2^0\))
- 2 (which is \(2^1\))
- 10 (not a power of 2)
- 2 x 10 (not a power of 2)
So the appropriate options from the given choices would be 1 and 2.