Question

Determine o número binário (10101)2, na base 10.

Answer 1

Olá!

$\\ \mathsf{1 \cdot 2^4 + 0 \cdot 2^3 + 1 \cdot 2^2 + 0 \cdot 2^1 + 1 \cdot 2^0 =} \\\\ \mathsf{1 \cdot 16 + 0 \cdot 8 + 1 \cdot 4 + 0 \cdot 2 + 1 \cdot 1 =} \\\\ \mathsf{16 + 0 + 4 + 0 + 1 =} \\\\ \boxed{\mathsf{21}}$