I hate this app why doesnt this app help at all

Mount saint helen the great lakes and death valley are physical features of the earth which scientific term describes these features

Based on the narrator's comments about living with the widow douglas, the reader can infer that a) the narrator doesn't care much for civilization and its strict rules. b) the narrator admires and wants to become more civilized and refined. c) the narrator is extremely religious and of high moral standing. d) the narrator desires to become a productive member of society.

How do you work out 21.3-8= show your working. plz