What are the vertices of the hyperbola whose equation is (y+6)^2/81 - (x+8)^2/49 = 1

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

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.

Asap! i need this done today and i really don’t understand it. some one ! will mark