An author published a book which was being sold online. The first month the author sold 11000 books, but the sales were declining steadily at 10% each month. If this trend continues, how many total books would the author have sold over the first 9 months, round to nearest whole number ?

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.

How can you construct perpendicular lines and prove theorems about perpendicular lines

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?