Fusion reactions power the in space. Humans currently use fusion in , but researchers are seeking more applications.

By what percent will the product of two numbers change, if the first number increases by 70%, while the second number decreases by 40%.

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.

Ased on the information in "edward jenner and the history of smallpox and vaccination,” after concluding that cowpox could be used to eliminate smallpox, jenner