The population of a local species of bees can be found using an infinite geometric series where a1=860 and the common ratio is 1/5. write the sum in sigma notation, and calculate the sum(if possible)that will be the upper limit of this population

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?