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. 4 years B. 3 years C. 5 years D. 10 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. -0.0096 B. 0.0012 C. -0.0024 D. -0.0048 Hint 4. 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 A, by about 80,000 B. City B, by about 30,000 C. City B, by about 80,000 D. City A, by about 30,000 Hint 5. Suppose a new car loses value at 10% per year for the first 5 years. When should the owner sell it if they want to receive 75% of what they paid for it? A. after 3 years B. after 2.73 years C. after 2.5 years D. after 2 years Hint