Amembership to the gym costs $ 25 per person in 1995 .the membership cost has increased by an average of $ 6 per person for each year since 1995 .write a linear equation for the cost of a gym membership for one person since 1995. so , what is the cost of a gym membership in 2009

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.