Jack wanted to measure the weight of his luggage at the airport before departure. He was surprised to see that it weighed 23.6 kg. Then he stood on the weight with and without his luggage and understood that the scale is malfunctioning as the last two weights of 91.2 kg and 65.5 kg were obviously off. What was the true weight of his luggage?

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?