The equation shows how the total cost of visiting the history museum as a member is related to the number of visits c=18v The variable v represents the number of visits and the variable c represents the total costs of visits what is the maximum number of visits a member of the history mueseum can make for a total cost of 18$

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.