7. The sweater cost $35, and the tax rate was 8%. How much do you have to pay in tax? 8. Based on the information in question 7, what is the total cost of the sweater?
9. Mike is buying a new hockey stick that costs $149. The hockey stick is on sale for 25% off the regular price. How much will Mike save with the 25% off?

NEED THIS DONE ASAP DUE TOMORROW
worth 10 points

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.