In order to go to college, hank goes from working full-time making $28,000 per year to making part-time at half the salary for 2 years. the cost of his education will be $5,000. if hank makes $33,000 oer year after getting his degree, approximately how many years will it have to recover his investment?

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.