Distance between two points (-3,-2) and (1,3)

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

Which of the following values have 3 significant figures? check all that apply. a. 10.1 b. 100.05 c. 120 d. 129