Explanation:
mean = sum of the numbers over the total numbers
mean = 2+5+4+1+8/5
mean =20/5
mean=4
Answer:Speed
Explanation: Velocity is the speed of something in a given direction, acceleration is the rate of change of velocity per unit of time, so the only logical answer is speed.
Dam building across naturally flowing rivers tend to decrease discharge of surplus water into sea, reduce nutrient concentration in estuaries and coastal waters, and diminish plankton blooms as well as fish landings.