Can you please explain to me how to solve these questions I was trying to solve them but I got confused, Thanks

IVE-\"IF. A wild herd of mountain goats had 4500 members in 2005. and 4600 members in 2006. a. Assume exponential growth model, write an equation for the size of the herd (H) as a function of the number of years since 2005 (t). b. Use your model to predict the size of the herd in the year 2020. c. Identify the domain and range of your function. A particular drug is administered in doses of 200 mg, and is eliminated from the body at a \"continuous rate\" of 15% per hour. a. Let D = the amount of the drug still in the system, and let t = it of hours after administration. Write an equation (using e) relating the two variables. b. How much of the drug will be in the patient's system after 5.5 hours? c. Identify the practical domain and range of your function. a I \\ _ _ _!\\