Twice the difference of a number of 9

Approximately how many more job openings are expected for security guards than pharmacy technicians? a. 2,000 b. 11,100 c. 21,000 d. 32,000

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters

The equation line of cd is y=-2x-2. write an equation of a line parallels to line cd in slope-intercept form that contains point (4,5)