Solve the problem.An orchard operator must dilute 11 quarts of a 60% insecticide solution by adding water. How many quarts of water should be added to get a mixture that is 2% insecticide?

A. 219 quarts
B. 19 quarts
C. 119 quarts
D. 319 quarts


Answer: D

Mathematics

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Provide an appropriate response.Determine the interval(s) over which  is concave upward.

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Mathematics