1 Gives The Loudness Of Sound L In Db Based On The Intensity Of Sound I In W M2 The Value 10 12 The Formula L 1 (27.18 KiB) Viewed 54 times
(1) gives the loudness of sound L. (in dB) based on the intensity of sound I (in W/m2). The value -10 -12 The formula L=10 log threshold for hearing for mid-frequency sounds. Hearing impairment is often measured according to the minimal sound level (in dB) detected by an individual for sounds at various frequencies. For one frequency, the table depicts the level of hearing impairment. Loudness (dB) 26≤L≤40 41LS55 Category Mild Moderate Moderately severe Severe Profound 56≤L≤70 71 ≤LS90 L>90 W/m² is the minimal Determine the range that represents the intensity of sound that can be heard by an individual with severe hearing impairment. Write your answers in scientific notation. Round your answers to two decimal places, if necessary. The range that represents the intensity of sound that can be heard by an individual with severe hearing impairment is W/m² SIS W/m². 10 O X
On August 31, 1854, an epidemic of cholera was discovered in London, England, resulting from a contaminated community water pump. By the end of September, more than 600 citizens who drank water from the pump had died. The cumulative number of deaths D (t) at a time / days after August 31 is given by D (1)-91+160 In (r+1). (a) Determine the cumulative number of deaths by September 19. Round the answer to the nearest whole unit. (b) Approximately how many days after August 31 did the cumulative number of deaths reach 5507 Round the answer to the nearest whole unit. Part 1 of 2 Number of Deaths 800 600 400 200 0¹ 0 Cumulative Deaths vs. Time D()-91+ 160In(t+1) 1 5 10 15 20 25 Days after August 31 The cumulative number of deaths by September 19 was approximately. X 30
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