Which curve has the greater length on the interval [ - 1,1], y = 1 - x ory = cos (xx/2)? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to three decimal places as needed.) O A. The curve of y = 1 - x has a length of unit(s). The curve of y - cos (xx/2) has a length of unit(s). Therefore, y = 1 -x has the greater length on the interval [ - 1, 1]. O B. The curve of y = 1 - x has a length of unit(s). The curve of y = cos (xx/2) has a length of unit(s). Therefore, y = cos (ntx/2) has the greater length on the interval [ - 1, 1].Suppose a force of 30 N is required to stretch and hold a spring 0.2 m from its equilibrium position. a. Assuming the spring obeys Hooke's law, find the spring constant k. b. How much work is required to compress the spring 0.3 m from its equilibrium position? c. How much work is required to stretch the spring 0.5 m from its equilibrium position? d. How much additional work is required to stretch the spring 0.2 m if it has already been stretched 0.2 m from its equilibrium? a. k = (Type an integer or a decimal.)