D. March because it is just below the 1 million marker on the graph and it is the only one that low.
Answer:
Our drinking water comes from lakes, rivers and groundwater. For most Americans, the water then flows from intake points to a treatment plant, a storage tank, and then to our houses through various pipe systems. A typical water treatment process.
Explanation:
As close as I can read it, it appears to be
1/12 gram/second
(0.08333... gm/sec)
Higher pitched sounds produce waves which are closer together than for lower pitched sounds. A smaller triangle or cymbal will make a relatively higher pitch note
