A subway train has a sound intensity level of 90 db and a
A subway train has a sound intensity level of 90 dB, and a boiler shop has a sound intensity level of 100 dB. How many times greater is the new sound intensity of the shop than that of the train? ------x
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a subway train has a sound intensity level of 90 db and a boiler shop has a sound intensity level of 100 db how many
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