The expression "1*2^2 + 0*2^1 + 1*2^0" represents a binary number in base-2. Each term consists of a binary digit (0 or 1) multiplied by a power of 2. In this case, the first term is 1 multiplied by 2 raised to the power of 2, the second term is 0 multiplied by 2 raised to the power of 1, and the last term is 1 multiplied by 2 raised to the power of 0. Calculating each term gives us: 1*4 (from 2^2) + 0*2 (from 2^1) + 1*1 (from 2^0). This simplifies to 4 + 0 + 1, resulting in a total of 5. Therefore, the binary number "101" equals the decimal number 5 in the base-10 system.