15. Which of the following sets of quantum numbers are allowed a) n=1, 1 = 0 and m=0

c) n=1,1=0 and m = +1

b) n=2, 1 = 2 and m =+ 1

d) n = 2, 1= 2 and m = 0

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Line segment eg is partitioned by point f in the ratio 1: 1. point e is at e (0, 4), and point f is at (1, 3). what are the coordinates of point g? (−1, 5) (2, 2) (3, 1) (4, 0)

If the perimeter of the square equals the perimeter of the regular pentagon. each side of a pentagon is 16cm long. how long is each side of the square?