Which sequence of transformations performed on shape i confirms the congruence of shape ii and shape i? a. a reflection across the y-axis and then a translation down 16 units b. a 90° counterclockwise rotation about the origin and then a translation down 8 units c. a 90° clockwise rotation about the origin and then a translation left 16 units d. a 180° rotation about the origin and then a translation left 8 units

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.