19. R is the 4th quadrant region enclosed by the x-axis and the curve y = )t:2 - 2km where k > 0. Find the value of It so that the area of the region R is 36 square units. (5 points) 20' R is the rst quadrant region enclosed by the Harris the curve 5! = 2x + a, and the line x = a where a > D. Find the value of a so that the area of the region R Is 18 square units. (5 points) 21. R is the first quadrant region enclosed by the x-axis. the curve y = a + b. and the line 1 = b. where b > 0. Find the value of b so that the area of the region R Is 288 square units. (5 points) 0 None of these 23' The base of a solid Is bounded by thecurve y =1)\". 2 .the xaxls and the linex = 1. The cross sections, taken perpendicular to the x-axia. are squares. Find the volume of the solid. [5 points) 0 Noneonhese 24. The base of a solid Is bounded by thecurve y =Jx + 2 , the x-axls and the line it = 2. The cross sections, taken perpendicular to the x-axis. are squares. Find the volume of the solid. (5 points) 0 None of these