1. The following table charts the federal debt of the USA in terms of amount owed per citizen. Each year's debt is based on Jan. 1 of that year. (a) Index time to Jan. 1 of 1950 . Find the quadratic model. (b) Estimate the federal debt per citizen in 2021. (c) In what year did the federal debt per citizen first exceed $15,000 ? 2. If a person is given a 30ml of a dose and 20% of this drug is removed from the bloodstream every hour by the kidneys. a. What is the half-life of the drug? (Nearest tenth) b. How much ml of this drug will be left in the bloodstream after 2.5 hours? (Nearest tenth)