Solve the problem.The revenue achieved by selling x graphing calculators is figured to be 
The cost of each calculator is 
How many graphing calculators must be sold to make a profit (revenue - cost) of at least $492.80?
A. {x?46 < x < 54}
B. {x?44 < x < 56}
C. {x?19 < x < 31}
D. {x?45 < x < 43}
Answer: B
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Write a word name for the number in the sentence.Repeating patterns in numbers like 400,040,004,000 held mystical significance for most of the members of the village.
A. Forty billion, four hundred million, four B. Four hundred billion, forty million, four thousand C. Four billion, four hundred million, forty thousand D. Four hundred million, forty thousand, four
Provide an appropriate response.You are graphing 2x2 + 3y2 > 5. You have drawn the graph of 
What single point will allow you to determine the correct region?
A. (2, 5) B. (3, 5) C. (2, 3) D. The origin
Rationalize the denominator.
A. 
B. 
C. 
D. 
Determine where the function is increasing and where it is decreasing.f(x) = -x2 + 4x - 3
A. increasing on (2, ?) decreasing on (-?, 2) B. increasing on (-?, 1) decreasing on (1, ?) C. increasing on (1, ?) decreasing on (-?, 1) D. increasing on (-?, 2) decreasing on (2, ?)