Ill give a ! the population of a local species of dragonfly can be found using an infinite geometric series where a1 = 30 and the common ratio is two fifths. write the sum in sigma notation and calculate the sum that will be the upper limit of this population.

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?