4. A spotlight is on the ground 20 ft away from a wall and a 6 ft tall person is walking towards the wall at a speed of 3 ft/sec. How fast is the length of his shadow on the wall changing when the person is 8 feet from the wall?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

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.

Answer this question i need as soon as possible