I got that pH=3.65 using the fact that Ka=[H⁺][A⁻]/[HA] at equilibrium. In the ice table, I stands for initial, C stands for change, and E stands for equilibrium.
I hope this helps. Let me know if anything is unclear.
The scientist that was the first to use the telescope in astronomy was Newton
It is either netforce or gforce
I have a feeling that #2 is the one.