Please answer quickly! What is the explicit formula for the sequence -17,-34,-68,-136...?
A. y= -2x-17
B. y= -2x-15
C. y= -15(2)x
D. y= -17(2)x-1

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.