Solve the quadratic equation by the method of your choice.2x2 = 22
A. {12}
B. {-11, 11}
C. {11}
D. {-
, 
}
Answer: D
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Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Solve the problem.From a distance of 50 feet from the base of a building, the angle of elevation to the top of the building is 60°. Estimate the height of the building to the nearest foot.
A. 29 ft B. 25 ft C. 43 ft D. 87 ft
Write the first four terms of the geometric sequence.a = 3, a4 = -81
A. 3, -9, -27, -81 B. -9, 27, -81, 243 C. 3, -9, 27, -81 D. -3, -9, -27, -81
Solve the problem.A wild animal preserve can support no more than 200 elephants. 37 elephants were known to be in the preserve in 1980. Assume that the rate of growth of the population is 
= 0.0007P(200 - P)where t is time in years. How long will it take for the elephant population to increase from 37 to 110? [First find a formula for the elephant population in terms of t.]
A. 12.5 years B. 13.5 years C. 10.5 years D. 12.0 years