The formula a(t)=412+5450 can be used to approximate the total average credit card debt in the United States household ( in dollars) T years after 1995. Use this formula to predict what the total average credit card debt will be in the year 2024. In the year 2020 for the total average credit card debt for US household will be $

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.