P d = 10 log Po where P is the power or intensity of the sound Po is the weakest sound that the human ear can hear. One hot water pump has a noise rating of 55 decibels. A rock concert, has a noise rating of 12 decibels. The rock concert noise is how many times more intense than the hot water pump noise? The rock concert's noise is times as intense as the hot water pump. If needed, round to 2 decimal places.

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