How do I find lateral surface area

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?

What is the relationship between all triangles that can be drawn given the same three angles

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?