Why is about half of all freshwater on Earth is inaccessible to humans? Group of answer choices

It is too deep underground

It is in the atmosphere in clouds

It is too dirty to clean

It is frozen in glaciers

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.