The National Center for Health Statistics publishes information on the educational level of married Americans in Vital Statistics of the United States. For one community, the probability that a married man is a college graduate is 0.35. The probability that the wife is a college graduate is 0.41, and the probability that both the husband and the wife are college graduates is 0.14. If a married couple from this community is randomly selected, what is the probability that either the man or his wife is a college graduate?

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?