Julia and her husband own a coffee shop. They experimented with mixing a City Roast Columbian coffee that cost $7.10 per pound with French Roast Columbian coffee that cost $8.30 per pound to make a 24-pound blend. Their blend should cost them $7.50 per pound. How much of each type of coffee should they buy?

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.