27.The price of beef is increasing. The price of a pound of beef is initially $2.50 per pound. Write an equation for the price of a pound of beef, in dollars, after tyears if:(a)the price increases 3 cents per year. (b)the price increases 3% per year. 28.What are the minimum degrees of the following polynomials?
29.The balance of Jorge’s savings account (in dollars) is given by ttB)065.1(2500)(=, where tis in years.
30.x 10 20 30 40 50 f(x) 13 18 25 34 45 (a)What is the sign of g1858g4593g4666uni0032uni0030g4667? Explain your answer. (b)On the interval shown, does g1858g4666g1876g4667appear to be concave up or concave down? Explain your answer. (c)Estimate g1858g4593g4666uni0032uni0030g4667. 31. Refer to the following graph of ).(xf′(a)Where is f(x)increasing? (b)Where is f(x)decreasing?
32. The graph of f(x) is given below. (a) Use the graph to estimate )1(f′. (b) Is )2()1(ff′>′? Explain your answer. (c)Is )2()1(-′>′ff? Explain your answer. (d) Is )2()1(-′>′ff? Explain your answer. 33.A puppy is growing. His weight, w, in pounds, is a function of his age, t, in months.