What is 30% of a 10 slice pizza

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?