Who invented calculus?

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?

Need asap. solve for the following inequality

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.