List three reasons why the spanish mission system eventually broke down

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?