How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function a(t) = 350e-0.169t, where t is the time in years? round your answer to the nearest hundredth year.

Based on the figures as marked, /\rqs = —

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.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.