What will happen when you put a penny in vinigar

Answer question above and explain each step : )

The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left