1. How many significant figures are there in each of the following measurements? 4.72006 s 0.0003 km 400 mL 320.0 mg

2. How many significant figures are there in each of the following measurements? 4.72006 s (6 significant figures) 0.0003 km (1 significant figure) 400 mL (1 significant figure) 320.0 mg (4 significant figures)

3. Round each measurement to the number of significant figures indicated: 4.7259 cm to three significant figures 7000 g to five significant figures 0.0003 km to four significant figures

4. Round each measurement to the number of significant figures indicated: 4.7259 cm to three significant figures (4.73 cm) 7000 g to five significant figures (7000.0 g) 0.0003 km to four significant figures (0.0003000 km)

5. Calculate the sums and differences with the appropriate number of significant figures: 475.30 g + 300 g = 723.4 mm -145.0030 mm =

6. Calculate the sums and differences with the appropriate number of significant figures: 475.30 g + 300 g = 800 g 723.4 mm -145.0030 mm = 578.4 mm

7. Calculate the following multiplication and division problems with proper significant figures: 372.4 cm x 24.3 cm x 13.20 cm = 45.0 g/ 72.5 mL =

8. Calculate the following multiplication and division problems with proper significant figures: 372.4 cm x 24.3 cm x 13.20 cm = 119,000 cm^3 45.0 g/ 72.5 mL = 0.621 g/mL

9. Express the following numbers in scientific notation: 475,000,000 (answer with three significant figures) 0.000325 62.40 0.02030

10. Express the following numbers in scientific notation: 475,000,000 (answer with three significant figures) 4.75 x 10^8 0.000325 3.25 x 10^-4 62.40 6.240 x 10^1 0.02030 2.030 x 10^-2

11. Convert the following numbers from scientific notation to standard notation 4.75x10^5 3.0425x10^-3 4.8x10^10

12. Convert the following numbers from scientific notation to standard notation 4.75x10^5 475,000 3.0425x10^-3 0.0030425 4.8x10^10 48,000,000,000

13. Convert 1000 mL to liters.

14. “milli-” means 1/1000. So, 1000 mL = 1 L

15. Convert 3542 ft to miles

16. Start with what you know: 3542 ft Then state what you want to know: How many miles? There are 5280 ft in 1 mile. Therefore, 5280 ft. = 1 mile So, 5280 ft/1mile = 1 = 1 mile/5280 ft. 3542 ft. x 1 mile/5280 ft. = 0.6708 miles

17. Convert 100 cm to meters

18. “centi-” means 1/100, so 100 cm = 1 meter

19. Convert 11 inches to feet.

20. Start with what you know: 11 inches. Then state what you want to know: How many feet? There are 12 inches in 1 ft. Therefore, 12 inches = 1 ft. So, 12 inches/1 ft. = 1 = 1 ft./12 inches 11 in. x 1 ft./12 in. = 0.92 ft.

21. Convert 14.6 km to meters

22. Start with what you know: 14.6 km. Then state what you want to know: How many meters? There are 1000 m in 1 km. Therefore, 1000 m = 1 km So, 1000 m/1 km = 1 = 1 km/1000 m 14.6 km x 1000 m/1 km = 14,600 m