16. Express the following values in proper scientific notation with 3 significant figures: a. 1,236,840 b. 422000 c. 0.000000000000211 d. 0.000238 e. 0.0000205 17. Express each of the following values in standard notation. a. 8.41102 b. 8.41102 c. 8.41105 d. 8.41105 18. All of the following values represent improper scientific notation. Correct them to proper scientific notation OR standard notation. a. 75.0101 b. 0.55102 c. 484102 19. Complete problem and express the answer in scientific notation. a. (2.0104)+(2.0104)= b. (2.0103)+(2.0104)= c. (2.0104)+(2.0104)= d. (2.0105)(2.0104)= 20. Complete problem and express the answer in scientific notation. a. (2.0104)(2.0104)= b. (2.0103)(2.0104)= c. (2.0104)(2.0104)= d. (2.0104)/(2.0105)= c. (2.0103)/(2.0105)= f. (2.010)/(2.0103)=