6. What is the circumference of a circle with a radius of 4.5 mm? Round your answer to the nearest millimeter.
14 mm
141 mm
28 mm
283 mm

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms