Solve the problem.The number of mosquitoes M(x), in millions, in a certain area depends on the June rainfall x, in inches: M(x) = 7x - x2. What rainfall produces the maximum number of mosquitoes?
A. 3.5 in.
B. 7 in.
C. 49 in.
D. 0 in.
Answer: A
Mathematics
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Decide whether the statement is true or false.A numeral in an even base is even if and only if its ones digit is even.
A. True B. False
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Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 3cos ?x, y = 0, x = -0.5, x = 0.5
A. 
?
B. 3?
C. 18?
D. 9?
Mathematics
Find the limit.
A. 1/2 B. ? C. -? D. Does not exist
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Simplify.-7 + 4(-2) - 12
A. -34 B. -11 C. -27 D. -42
Mathematics