1. Real Estate Julie bought a house for \$100,000 five years ago. If the value of the house has appreciated 5% per year, how much is it worth now? A. \$127,628.16 B. \$119,643.57 C. \$125,000.00 D. \$77,378.09 Hint 2. Business An analyst estimates that the computers his company just bought will depreciate at a rate of 25% per year. At this rate, approximately how long will it take a computer to depreciate to 30% of its original value? A. 3 years B. 10 years C. 4 years D. 5 years Hint 3. Radioactivity The half-life of uranium-232 is 72 years. Find the approximate value of k in the formula y = nekt for uranium-232. Assume t is in years. A. -0.0048 B. -0.0096 C. 0.0012 D. -0.0024 Hint 4. Population The population of Redville grew from 5432 in 1990 to 7116 in 2000. Assuming the population is growing exponentially, predict the population of Redville in 2005. A. about 8360 B. about 8140 C. about 8290 D. about 7960 Hint 5. Two cities have insect problems. The insects in City A increase exponentially according to the equation y = 120,000e0.04t. The insects in City B increase exponentially according to the equation y = 90,000e0.08t. In 15 years, which city will have more insects, and by approximately how much? A. City B, by about 30,000 B. City A, by about 30,000 C. City B, by about 80,000 D. City A, by about 80,000 Hint