Find the surface area of the pyramid. Base Area = 100 cm, slant height of 12 and length of 6, its also a hexagonal pyramid

Construct the graph that models the given situation

I’m really confused and need your assist me with this question i’ve never been taught

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?