Researchers in Antarctica discovered a warm sea current under a glacier that is causing the glacier to melt. The ice shelf of the glacier had a thickness of approximately 450 m when it was first discovered. The thickness of the ice shelf is decreasing at an average rate of 0.06 m per day. Which function can be used to find the thickness of the ice shelf in meters x days since the discovery?t(x)= 450 -0.06xt(x)= -0.06(x+450)t(x)= 450+ 0.06xt(x)= 0.06 (x+450)