dicated equations over the given intervo s (when stated). Compute quantity. / answers to three decimal places. [Hint: Ared is always a posit s of the in 68. 41. y = 2 - ry = 0;0 = =4 69. 42. y = 2x - 1; y = 0;05 x= 1 70. 43. y = x2 - 4; y = 0;-2 5 x 54 44. y = X2 - 1; y =0; -15 x=2 to f giv 45. y = x2 - 4x; y = 0; -1 5 x54 71 46. y = x2 - 6x; y = 0; -1 5 x 52 72 index of in- 47. y = -2x + 8; 1 = 12; -1 5 x=2 income most 48. y = 2x + 6; y = 3; -1 5 x=2 49. y = 3x2; y = 12 t equally 50. /y = x2; y = 9 51. y = 4 - x;y =-5 tes is income uted? 52. y = x2 - 1;y =3 e most 53. y = x- + 1; y = 2x - 2; -1 = x=2 54. y = x- - 1; y = x- 2;-2 5x=1 ite integrals 55. y = e05x; y = - -; 1=x=2 areas over x' 1 56. y = =; y = -e"; 0.5