An old bone contains 80% of its original carbon-14. Use the half-life model to find the age of the bone. Find an equation equivalent

Use set buikder notation to represent the following set: {, -2, -1, 0}

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

What is the radius of the cone in the diagram? round your answer to the nearest whole number