At a school of 1000 students, a sample is selected using an alphabetical list from the office. A number from 1 to 50 is chosen randomly. The sample consists of the student who is in the position on the list and every tenth student from that position. What method of sampling is used?

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.