Calculate $E_{16}-D{A}_{16}={?}_{10}$

A$.10$

B$.18$

C$.28$

D$.71$

E$.$ None of the aboveCalculate ${11110110}_2+{10011101}_2={?}_{10}$

A$.403$

B$.446$

C$.464$

D$.474$

E$.$ None of the above