Solve the problem.The cost in millions of dollars for a company to manufacture x thousand automobiles is given by the function C(x) = 5x2 - 40x + 144. Find the number of automobiles that must be produced to minimize the cost.
A. 20 thousand automobiles
B. 64 thousand automobiles
C. 8 thousand automobiles
D. 4 thousand automobiles
Answer: D
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Determine the population and the sample.Each month a pollster questions by phone a random sample of about 10,000 people aged 21 and older living in Country X on political topics.
A. Population: 10,000 people aged 21 and older living in Country X; Sample: 21 people who get questioned B. Population: all people living in Country X; Sample: 21 people who get questioned C. Population: 10,000 people living in Country X; Sample: 21 people who get questioned D. Population: people aged 21 and older living in Country X; Sample: 10,000 people who get questioned
Determine the vertex and the x-intercepts. Then sketch the graph.y = x2 - 2x
A. 
Vertex: (- 1, - 1);
x-intercepts: (0, 0) and (-2, 0)
B. 
Vertex: (1, 1);
x-intercepts: (0, 0) and (2, 0)
C. 
Vertex: (1, - 1);
x-intercepts: (0, 0) and (2, 0)
D. 
Vertex: (- 1, 1);
x-intercepts: (0, 0) and (-2, 0)
Find the square of the radical expression.
A. 16x2 + 4 B. 16x + 2 C. 16x + 4 D. 4x + 2
Write a signed number for the statement.159 feet above sea level
A. -159 B. 159