triangle cat is equilateral and centered at the origin. how many degrees will it need to be rotated counterclockwise about the origin to take point c to the initial location of point a?

60°
90°
120°
180°

What situation is an example of an observational study

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.

What is the range for 31,39,29,34,37,24,36,33,34,28