Two-ninths of the total number of batteries in Richard's desk drawer is made up of 16 batteries. How many batteries are there in the drawer?

Acircle has a circumference of 28.36 units what is the diameter of the circle

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.

Use the given information to determine the exact trigonometric value.