Carla can choose two of her three pairs of sneakers to take to a track meet. if the pairs of sneakers are called a, b, and c, which choice represents the sample space, s, for the event? s = {abc} s = {abc, cab} s = {ab, ac, bc} s = {ab, ba, ac, ca, bc, cb}

Precalculus question, image attached.

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?