Suppose an investment of $9,000 is invested at an annual rate of 4.596, compounded continuously. What is the average rate of change of the investment between years 18 and 28? Round your answer to the nearest cent/ penny. Answer =| dollars per year. {Round to two decimal places) 2.' Sales of portable MP3 players grew approximately exponentially from $0.09 billion in 2000 to $3.6 billion in 2005. Predict the sales of MP3 players in 2011. 5' billion Suppose a college bookstore sells 970 copies of a new (not used) textbook in 2003. Each year from 2003 to 2007, new-textbook sales are half of the previous year's sales (due to used-textbook sales). Let s = g(t) be the sales of copies of the new textbook in the year that is t years since 2003. Find an equation of y. W) = I What is the s-intercept of the model? What does it mean in this situation? This means [Select an answer v Find 9(4). What does it mean in this situation? What is the half-life of new-textbook sales? years A thyroid cancer patient ingests a single dose of radioactive iodine-131 to kill the cancer cells. Iodine-131 has an effective half-life of approximately 7.99 days-some is lost to radioactive decay, and some is removed through urination. Let t) be the percentage of iodine-131 that remains in the patient's body at t days since he ingested the iodine-131. Find an equation of f. m = For 3 days afteringesting the iodine-131, the patient must stay at least 1 meter away from other people, because the radiation he emits could be harmful. What percentage of the iodine-131 will remain in his body after 3 days? i i6 The patient can safely spend a lot of time near a child when at most 396 of the iodine-131 remains. Use \"intersect" on a graphing calculator to estimate when that time will be. 1113; [aw An archeologist discovers a tool made of wood. The half-life of carbon-14 is approximately 5760 years. If 5096 of the wood '5 carbon-14 remains, how old is the wood? Do this without using an equation. years old If 25% of the wood's carbon-14 remains, how old is the wood? Do this without using an equation. ' ] years old If 10% of the wood's carbon-14 remains, how old is the wood? First, guess an approximate age without solving an equation. Then, use an equation to find the age. Guess: [ ' years old Exact solution: [ 'years old Do NOT use any preliminary rounded numbers