If I get 5 XP every 5 minutes, how long does it take to get 10,000 XP?

Which expression is not a polynomial?

The quadratic function h(t)=-16.1t^2+150 choose the graph representation

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.