Find the largest open intervals where the function is concave upward.f(x) = 4x3 - 45x2 + 150x

A.
B.
C.
D.

Answer: A

Mathematics

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Solve the problem.A typesetter can keyboard 286 words in 3.4 minutes. How many words per minute can he set? Round to the nearest tenth.

A. 84.1 words/min B. 972.4 words/min C. 289.4 words/min D. 282.6 words/min

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Mathematics

Solve. Give your answer as a mixed number if appropriate. = 

A.
B. 18
C. 4
D. 9

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Mathematics

Graph the system of inequalities, and find the coordinates of the vertices.6y - x ? 8,-y + 3x ? 6,x ? 0

A.

B.

C.

D.


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Mathematics

Provide an appropriate response.Is  a rational or irrational number?

A. Irrational B. Rational C. Both rational and irrational D. Neither

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Mathematics