1998+MC+Calc+only

78,79 worked by joon baek

80-81worked by max bredthauer
 * 1) 80. C
 * 2) 81. D



-kathy oh

i agree -matthew lee

84. (0,2) (10,4) int. dy/y = k int. dt lny = kt + c Ce^kt = y 2 = Ce^k*0 2 = C 4 = 2e^10k ln2 = 10klne k = .069 = A.

85. St = .5 ( 3(10+30) + 2(30+40) + 1(40+20) ) St = 160 = C.

84.-85. worked by Valerie Finstad Checked by max Bredthauer correct