The sum of a whole number A and a whole number B is 12, and the ratio A:B is equivalent to 1:3. Find A and B

With this one. will mark brainliest

What is the solution to the equation e3x=12? round your answer to the nearest hundredth

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?