am i missing something for this analytical chem problem?

[James3shin]

Calc. Solubility of CaSO4(s) in pure water?

given:
CaSO4(s) <---> Ca 2+ + SO4 2- Ksp = 2.0 x 10^-5

CaSO4(aq) <----> Ca 2+ + SO4 2- K = 5.0 x 10^-5