The school newspaper surveyed the student body for an article about club membership. the table
below shows the number of students in each grade level who belong to one or more clubs.
1 club 2 clubs 3 or more clubs
9th 90 33 12
10th 125 12 15
11th 87 22 18
12th 75 27 23
if there are 180 students in ninth grade, what percentage of the ninth grade students belong to
more than one club?

What is the value of x? enter your answer in the box. (cm)

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0