Does God Answer the Prayers of the Saints?

Yes, God hears our prayers in this world and He hears the prayers of the saints in heaven.

Catechism of the Catholic Church:

956 The intercession of the saints. “Being more closely united to Christ, those who dwell in heaven fix the whole Church more firmly in holiness. . . . They do not cease to intercede with the Father for us, as they proffer the merits which they acquired on earth through the one mediator between God and men, Christ Jesus . . . . So by their fraternal concern is our weakness greatly helped.”