Adam got 56 out of 84 correct in his test. what fraction of the marks did he get correct

Anyone know? will mark brainliest if correct!

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?

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?