Find all the values of x (if any) where the tangent line to the graph of the given equation is horizontal. Round your answer to two decimal places.
?

?

A.
B.
C.
D.
E.


Answer: A

Mathematics

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Solve the differential equation.y'' - 6y' + 8y = 0

A. y = e4x(C1 cos 2x + C2 sin 2x) B. y = e2x(C1 cos 4x + C2 sin 4x) C. y = C1e-2x + C2e-4x  D. y = C1e2x + C2e4x 

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Find the mean. Round to the nearest tenth unless otherwise stated.Annual salaries: $21,096, $18,265, $30,962, $24,944Round to the nearest whole number.

A. $23,816 B. $23,817 C. $18,265 D. $21,096

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Find the reciprocal of the number.

A. 7
B.
C.
D.

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Write the sum in summation notation. +  +  +   + . . .

A.
B.
C.
D.

Mathematics