I Question 19 (3 points] The CIA published data about foreign countries on its web page. In particular they show total population as well as population growth. If a student is looking at Russia, they will see that the total population of Russia is declining. When they look at the table that shows annual population growth all the rates are positive. Assume population grows and declines at a rate proportional to the population. What is the problem? l l Question 20 (3 points) Many populations are facing negative growth rates. If the population of the Ukraine was 60 million in 2008 and will shrink to 59.3 million people in 2009, write the equation which models the Ukraine population over time if the population loss is proportional to population at a given time. Question 21 {3 points) If a population of fruit flies triples every 6 days. What is k, the proportionality constant? I Question 22 (3 points) Assume that the rate of evaporation for water is proportional to the amount of water in a bowl. If Jill places 1 cup of water (8 ounces) outside and notices that there is 5': cup of water 7 hours later. How much water will be left in 9 hours? I Question 23 [3 points) If a population of is becoming extinct and the population is decaying exponentially. Assume that there are 2,000 animals, and there will only be one animal in 50 years. What is k, the rate of decay? Question 24 (3 points] Assume that the rate of evaporation for water is proportional to the initial amount of water in a bowl. If Jill places 1 cup of water outside and notices that there is 1/2 cup of water 6 hours later. Can she use a differential equation to find when there is no water left