9. The populations of several different regions of a state are shown below. Find the mean of the data.
Region 1: 20,200
Region 2: 14,500
Region 3: 18,800
Region 4: 9,300
Region 5: 2,200
O A 13,000
OB 18,000
O C 65,000
D 14,500

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=