Evaluate the integral (cos x)^8 from 0 to pi/2. Use Wallis formula Select the correct response: O 105pi/256 O 35/512 O 35pi/256 O 35pi/768ABC Company estimates that the cost (in pesos) of producing x shirts of a certain product is given by C = 160,000 + 0.02x + 0.04x^2. How much had the company save at level where the average cost per shirt is minimized compare to 500 shirts production. Hint: A = C/x. Select the correct response: O P280.00 O P100.00 O P200.00 O P180.00Question 34 of 50 Find the radius of curvature at any point of the curve y + In(cos x) = 0. Select the correct response: O COS X O sec x O 1.57 O 1