Find a parametric equation for the parabola described.Vertex at (1, 3); directrix y = 1
A. x = 
t2 - 3, y = t - 1
B. y = 
t2 + 3, x = t + 1
C. x = 
t2 + 3, y = t + 1
D. y = 
t2 - 3, x = t - 1
Answer: B
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Solve the problem.In a local election, 27,700 people voted. This was an increase of 5% over the last election. How many people voted in the last election?
A. 29,158 people B. 26,381 people C. 29,085 people D. 26,315 people
Find the standard-form equation of the hyperbola centered at the origin which satisfies the given conditions.Asymptotes y = 
x, y = - 
x; one vertex is (11, 0)
A. 
- 
= 11
B. 
- 
= 1089
C. 
- 
= 1
D. 
- 
= 1
Factor.9x4 + 27x2 + 20
A. (3x2 + 5)(3x2 + 4) B. (3x2 + 20)(3x2 + 1) C. (3x2 - 5)(3x2 - 4) D. (9x2 + 5)(x2 + 4)
Solve the problem.A surveyor standing 70 meters from the base of a building measures the angle to the top of the building and finds it to be 35°. The surveyor then measures the angle to the top of the radio tower on the building and finds that it is 50°. How tall is the radio tower?
A. 13.47 m B. 12.35 m C. 34.41 m D. 18.76 m