Determine the location of the last significant place value by placing a bar over the digit. (Example: 1.700)
II. 8,040
14. 0.0300
17. 699.5
19. 2.000 x 102
12. 0.90100
15. 90, 100
18. 4.7 x 10-8
20. 10,800,000.0
13. 3.01 x 1021 16. 0.000410

What? i don’t understand

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.