12 laps in 36 min how many in an hour

What is the approximate circumference of the circle shown below?

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

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?