Calculate the Solubility of MgF₂ in Water If the $\times$ 10^-9 $\times$

Calculate the solubility of MgF₂ in water if the
K_sp for the compound is 6.40 $\times$ 10^-9.

A) 2.13 $\times$ 10^-9 M
B) 1.86 $\times$ 10^-3 M
C) 1.17 $\times$ 10^-3 M
D) 1.47 $\times$ 10^-3 M
E) 3.25 $\times$ 10⁵ M