  We obtain a determinant representation of normalized scalar products of
on-shell and off-shell Bethe vectors in the inhomogeneous 8-vertex model. We
consider the case of rational anisotropy parameter and use the generalized
algebraic Bethe ansatz approach. Our method is to obtain a system of linear
equations for the scalar products, prove its solvability and solve it in terms
of determinants of explicitly known matrices.
