Two atmospheric sound sources A and B emit isotropically at constant power. The sound levels B of their emissions are plotted in the figure versus the radial distance r from the sources. The vertical-axis scale is set by B1 = 84.0 dB and B, = 60.0 dB. What are (a) the ratio of the larger power to the smaller power and (b) the difference in their sound levels at r = 9.10 m? B1 A B2 100 500 1000 r (m)

Two atmospheric sound sources A and B emit isotropically at constant power. The sound levels B of their emissions are plotted in the figure versus the radial distance r from the sources. The vertical-axis scale is set by B1 = 84.0 dB and B, = 60.0 dB. What are (a) the ratio of the larger power to the smaller power and (b) the difference in their sound levels at r = 9.10 m? B1 A B2 100 500 1000 r (m)