Help plz i will give brainliest to the correct answer

Classify the polygon by its number of sides. state whether the polygon appears to be regular or not regular. a.heptagon, regular b. heptagon, not regular c. octagon, regular d. octagon, not regular

20 da is equal to a. 2,000 cm. b. 2 m. c. 20,000 cm. d. 20,000 mm

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5