1. Convert each of the following into scientific notation. a. 0.00000615 b. 85,000,000. c. 0.00145 d. 9,200. 2. Convert from scientific notation back to a standard notation. a. 2.3102 b. 9.52103 c. 8.09100 d. 3.088105 e. 4.239102 3. Rewrite the following numbers so that they are in proper scientific notation. a. 72.44103 b. 9.943105 c. 588,399102 4. How many significant figures are in the following numbers? a. 7,521 b. 1.000 c. 0.6299104 d. 5,004.78 5. Calculate each of the following and report your answer in scientific notation. a. (3.5105)(4.8106)= b. (8.6103)(2.7108)= c. (4.91103)(6.6105)(3.92107)= 6. Answer the following using proper number of significant figures: 2130.32+2.357.432= (4.9)/(17.18.943)= (2.30)/(21.131.271)= (14.1+12.14)7.45=