2. Express the following numbers in scientific notation. Maintain the same number of significant figures. (6 points total) a. 3892 b. 0.0012 c. 840. 3. Express the following numbers in standard notation. (6 points total) a. 2.80 * 10 b. 4.9 * 10$ c. 9.38 * 10 4. Report the answer with the correct number of significant figures. (16 points total) a. 23.0 * 4.892 - b. 5.75 +6.0 +25.846 c. 36,590/3.028 = d. (2.52 +1.5)/15.5 = Unit conversions (10 points each) 5. Convert 2,490 mg into ounces. (1 ounce = 28 g) + c. 6. How many gallons of paint are there in a 4250 mL sample of paint? (1 gallon = 3.785 L) 7. Convert 4.80 * 10 cm into feet. (1 inch = 2.54 cm and I ft- 12 inches) Dosage calculation (10 points) 8. How many 75.0 mg tablets should someone weighing 148.2 lbs take if the recommended dosage of medication is 4.50 mg per kg of body weight? (1 kg = 2.2 lbs) Density (10 points) 9. Normal saline solution has a density of 1,005 g/mL. How many mL of solution are there in a 450.0 g sample of saline solution