An architect is designing a tunnel and is considering using the function y = -0.12x2 + 2.4a determine the shape of the tunnel's entrance, as shown in the figure. In this model, y is the height of the entrance in feet and x is the
distance in feet from one end of the entrance.

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?