Solve
-The Number of Mosquitoes $\mathrm { M } ( \mathrm { x } )$

question 47

Multiple Choice

Solve.
-The number of mosquitoes $\mathrm { M } ( \mathrm { x } )$ , in millions, in a certain area depends on the June rainfall $x$ , in inches, according to the function $\mathrm { M } ( \mathrm { x } ) = 3 \mathrm { x } - \mathrm { x } ^ { 2 }$ . What rainfall produces the maximum number of mosquitoes?

• A) \(1.5 \mathrm { in }\).
• B) \(9 \mathrm { in }\).
• C) \(0 \mathrm { in }\).
• D) 3 in.

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