At a certain temperature, the pH of a neutral solution is 7.69. What is the value of Kw at that temperature? Express your answer numerically using two significant figures.

The answer for #3 is c but i don't know why

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

Hey can you me with this i really need y’all