the half life of a substance is the amount of time it takes for half of the atoms in a sample of the substance to decay. the half life of cobalt-60 is 5.26 years. if Joan has a 100-gram sample, which graph best represents how much cobalt-60 will be left after 30 years?

What is the value of f(x) = 2.2 for f(-2)?

Bella want to know what the students at her school think of her show. which is the best group to survey to find this information a. go to the mall and ask all of the students she recognizes from school b. ask her viewers to call in durning an episode of the show c. get a list of students at her school from the office and use a random number generator to pick 30 of them d. get a list of students at her school from the office and pick the first 30 students on the list

George is putting trim around his rectangular deck, including the gate. he will need 44 feet of trim to do the entire deck. if the deck is 13 feet long, how wide is the deck?