Identify the equation without applying a rotation of axes.x2 - 3xy - 3y2 - 2x - 3y - 5 = 0
A. parabola
B. hyperbola
C. ellipse
D. not a conic
Answer: B
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A cross-section of a parabolic reflector is shown in the figure. The bulb is located at the focus and the opening at the focus is 18 cm. Find an equation of the parabola. Let V be the origin. Find the diameter of the opening |CD|, 19 cm from the vertex.
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Solve the problem.The natural resources of an island limit the growth of the population to a limiting value of 3423. The population of the island is given by the logistic equation 
where t is the number of years after 2010. What would be the predicted population of the island in 2019?
A. 2443 people B. 831 people C. 2714 people D. 2579 people
Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.cos 9
A. -0.91 B. -0.99 C. 0.91 D. 0.99
Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.
A. 6x3 B. 4x3 C. 4x-3 D. 8x3