Find parametric equations for C, if C is the curve of intersection of the hyperbolic paraboloid z = y² - x² and the cylinder x² + y² = 4 oriented counterclockwise as viewed from above.
What will be an ideal response?
x = 2cos(t), y = 2sin(t), z = -4cos(2t)
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Use algebraic and/or graphical methods to solve the inequality.2x3 + 9x2 - 27x - 54 > 0
A. x < -6 or - 
< x < 3
B. -6 < x < - 
or x > 3
C. x ? -6 or - 
? x ? 3
D. -6 ? x ? - 
or x ? 3
Evaluate the sum.
?
Fill in the blank(s) with the appropriate word(s).
Find the x- and y-intercepts of the graph of the given equation, if they exist. Then graph the equation.y = -6 - 8x
A. x: 
; y: -6
B. x: - 
; y: -6
C. x: -6; y: 
D. x: -6; y: - 
Use the pH scale to solve the problem. Use the given concentration [H+] of a substance to calculate the pH value of the substance and classify the substance as an acid or a base. Round to two decimal places.[H+] = 2.1 × 10-4
A. pH ? 6.68, acid B. pH ? 4.32, base C. pH ? 0.84, acid D. pH ? 3.68, acid