exam Maths Puzzle Numerical Ability

The cost, in millions of dollars, to move x% of pollution in a lake modeled by
C= 6,000/200 - 2x.

Question: What is the cost to remove 75% of the pollutant?

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exam Other Question
Solve by the elimination method
3r-2s=-4
2r+3s=32

what is the solution of the system Determine the approximate distance between A(1, 1, 1) and B(1, 2, 3).