What must students do with the 10 grid-ins on the math section of the PSAT? A. Arrive at an answer and put it in a grid
B. Arrive at an answer by creating a grid
C. Mark the correct answer on a grid
D. Mark the incorrect answer on a grid

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.