Find the circumference of a circle with an area of 530.93 square meters. Round your answer to the nearest tenth.

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?

How do i do this? i don’t understand

Is the square root of 4 plus the square root of 16 rational?