The half life of a radioactive kind of camium is 14 years. How much will be left after 28 years, if you start with 72 grams of it? Is urgent, if someone knows it and have a explanation it will help, thanks :)

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

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?