[tex]3) \\ \\ 25 = 2 {}^{4} + {2}^{3} + {2}^{0} \\ \\ 35 = {2}^{5} + {2}^{1} + {2}^{0} \\ \\ 111 = {2}^{6} + {2}^{5} + {2}^{3} + {2}^{2} + {2}^{1} + {2}^{0} \\ \\ 4) \\ \\ 1010111(2) = \\ \\ 1 \times {2}^{6} + 0 \times {2}^{5} + 1 \times {2}^{4} + 0 \times {2}^{3} + 1 \times {2}^{2} + 1 \times {2}^{1} + 1 \times 2 {}^{0} = \\ \\ 64 + 16 + 4 + 2 + 1 = 87(10) [/tex]
