An adult drinks a beverage containing 110 milligrams of caffeine. The amount c (in milligrams) of caffeine in the person's system can be modeled by the function c = 110(0.89)x where x is the number of hours that have elapsed. About how much caffeine is in the person's system after 3 hours?

Can (2,3 and square root 10) be sides ona right triangle?

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.

I’m still confused on how to work the percentages