What statements are true about my question?

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?

Find the domain of the following expression: 1/(√x)-2

How can (square root of 25) ^2 be rewritten?