Find the number of real number solutions for each equation

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?

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

What is the solution to the equation below? 3/x-2+6=square root x-2 +8