5 xÔz et zot sont deux angles adjacents<br />tels que xOz = 15° et xOt = 90°. B est un<br />point de [Oz). P et C sont les symétriques<br />respectifs de B par rapport à (Ot) et (Ox).<br />Montrer que les points P, O et C sont alignés.​

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?