A silver cube with an edge length of 2.28 cm2.28 cm and a gold cube with an edge length of 2.66 cm2.66 cm are both heated to 89.7 ∘C89.7 ∘C and placed in 100.5 mL 100.5 mL of water at 19.3 ∘C19.3 ∘C . What is the final temperature of the water when thermal equilibrium is reached?