9. The pressure inside a submarine increases as it dives deeper into the ocean. It exerted 25 pounds of pressure in the initial 1 m of its dive. Every metre after that, it exerted 20% more pressure than it did in the
previous metre. Use what you learned in sequences and series to solve these problems:
a) How many pounds of pressure are exerted by the submarine in the 9th metre? Round to the nearest
tenth.
(2A)

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.