7 Sound intensity model: L = 10 log L = loudness, in decibels (dB); I = sound intensity, in watts/m2; 10 = 10-12 watts/m2 The loudness of a jack hammer is 96 dB. Its sound intensity is about... The loudness of a compactor is 94 dB. Its sound intensity is about...

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Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?