Solve the problem.Suppose that the change in pressure of the oil in a reservoir can be approximated by: P(x) = x3 - 30x2 + 225x where x is time in years from the date of the first reading. This function is valid for 
By sketching a graph of P(x), estimate when the change in pressure is maximum.
A. In year 7
B. In year 5
C. In year 6
D. In year 4
Answer: B
Mathematics
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Use a graphing calculator or computer to determine which of the given viewing windows displays the most appropriate graph of the specified function.f(x) = 
A. [-5, 0] by [-10, 10] B. [-5, 5] by [-10, 10] C. [0, 5] by [-10, 10] D. [-2, 2] by [-10, 10]
Mathematics
Verify the identity.
= 
What will be an ideal response?
Mathematics
Divide.7.11 ÷ (-9)
A. -7.9 B. -1.79 C. -17.9 D. -0.79
Mathematics
Graph the inequality.x2 + y2 ? 36
A. 
B. 
C. 
D. 
Mathematics