Isaw . . the milling operation that recycles and contains all processed water, and the huge [residue-collecting] pond that, over time, will become a 600-acre wetland. i saw the sophisticated monitoring system for the early detection of contamination in the groundwater.
—t. h. watkins, "hard rock legacy," national geographic, march 2000

the quotation describes the management techniques of a modern gold mining operation. what is the primary purpose of these techniques?

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

Match the following items. 1 1 (4,4) 2. (-4,-2) 3. (3.-6) 4. (-4, 6) 5. (1,5)

Which phrase describes the time it takes for a planet to make a complete rotation