A company that produces snowboards, which are seasonal products, forecasts monthly sales over the next 2 years to be S= 23.1+0.442t +4.3 cos(m /6), where S is measured in thousands of units and t is the time in months, with : = 5 representing January 2010. Predict sales for following month. Round your answer to three decimal places. June 2011 O a. S = 32.974 32,974 units O b. S = 33.974 33,974 units O c. S = 34.974 34, 974 units O d. S = 35.974 35,974 units O e. S = 36.974 36,974 unitsFind the reference angle a', and select g and a' in standard position. 8 O a. 17x 8 8 O b. 9 7 17x A'= - AT= 8 8 OC. 7 = 8 O d. 17x -+ 1= 8 8 O e. 9A 8