Assuming this decline follows an exponential function and continues to hold, find the number of downloads in 2026 to the nearest 100,000. 7) A radioactive substance has a half-life of 17 hours. If after 41 hours you have 15.20 grams of it, how much did you have to start with, to the nearest hundredth of a gram? 8) An investment of 2000 dollars is placed into an account which pays 3.6% quoted rate, compounded quarterly. How long until the investment doubles?

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