HELP FAST FAST FAST FAST PLS ILL LOVE YOU FORVER. Greta is putting a 20 foot fence around her pool. She uses all the border to make four sections that are the same length. Which expression does NOT equal the length of one of these sections in feet?

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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