An object of mass 0.1 kg is attached to a spring of negligible mass and is executing simple harmonic oscillation with an angular frequency of 3 rad/s. if vx(0) = +0.5 m/s and x(0) = −0.1 m, what is the phase φ? the general solution for such an oscillator is x(t) = a cos(ω t + φ).

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.