Bankrate. com reported on a shocking statistic: only 54% of workers participate in their company's retirement plan. This means that 46% do not. With such an uncertain future for Social Security, this can leave almost 1 in 2 individuals without proper income during retirement. Jill collins, 20, decided she needs to have $250,000 in her retirement account upon retiring at 60. How much does she need to invest each year at 5% compounded annually to meet her goal?

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?