Ying is a professional deep water free diver. His altitude (in meters relative to sea level), xxx seconds after diving, is modeled by: D(x)=\dfrac{1}{36}(x-60)^2-100D(x)= 36 1 (x−60) 2 −100D, left parenthesis, x, right parenthesis, equals, start fraction, 1, divided by, 36, end fraction, left parenthesis, x, minus, 60, right parenthesis, squared, minus, 100 How many seconds after diving will Ying reach his lowest altitude?

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.