Quadrilateral A'B'C'D'A ′
B
′
C
′
D
′
A, prime, B, prime, C, prime, D, prime is the image of quadrilateral ABCDABCDA, B, C, D under a dilation with a scale factor of \dfrac{1}{3}
3
1

start fraction, 1, divided by, 3, end fraction.

Suppose that a disk drive has 5,000 cylinders, numbered 0 to 4,999. the drive is currently serving a request at cylinder 2,150, and the previous request was at cylinder 1,805. the queue of pending requests, in fifo order, is: 2069, 1212, 2296, 2800, 544, 1618, 356, 1523, 4965, 3681