Determine if the sequence below is arithmetic or geometric and determine the common difference / ratio in simplest form. 4, 2, 1, ... I need the help now ​

On a architect's drawing of a house, 1 inche representa 1.5

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.