Verbal statements of a problem requiring a formal proof. < is anyone good with these stuff???

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

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?