Let f(x) = 6x and g(x) = 3x2. Find the area of the region enclosed by f(a ) and g(a). Answer:Let f(ac) = 7ac2 and g(ac) = x2 + 4. Find the area of the region enclosed by f(x) and g(). Answer:\fA car rental company charges 40 dollars per day. 13 cents per kilometre driven, and a 35 dollar one-time processing fee for a car rental. (a) Write a formula for the cost 0 (in dollars) of renting a car as a function of the number of days d and the number of kilometres driven k. a: (b) if C = f(d, k), then f{4,660) 2 dollars. Suppose that C = f(m,t) = ts(5'1)t represents the concentration (in rngiliter) of a drug in the blood t 2 0 hours after m mg of the drug is injected. (a) Evaluate f{2, 2) = (b) Give a practical interpretation of your answer in part (a): f(2, 2) is... O A. the change in concentration of a 2 mg close in the blood 2 hours after injection. O B. the amount of a 2 mg dose in the blood 2 hours after injection. O C. the concentration of a 2 mg dose in the blood 2 hours after injection