Equations of Ellipses — Unit test Answers
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An ellipse has vertices along the major axis at (0, 1) and (0, −9). The foci of the ellipse are located at (0, −1) and (0, −7). The equation of the ellipse is in the form below.
A
a = 10B
b = 4C
h = 3D
k = 0
23
The height, h, in feet of the tip of the hour hand of a wall clock varies from 9 feet to 10 feet. Which of the following equations can be used to model the height as a function of time, t, in hours? Assume that the time at t = 0 is 12:00 a.m.
A
h = 0.5 cosine (StartFraction pi Over 12 EndFraction t) + 9.5
B
h = 0.5 cosine (StartFraction pi Over 6 EndFraction t) + 9.5
C
h = cosine (StartFraction pi Over 12 EndFraction t) + 9
D
h = cosine (StartFraction pi Over 6 EndFraction t) + 9
24
Angle D has a measure between 0° and 360° and is coterminal with a –920° angle. What is the measure of angle D?
A
155°B
160°C
165°D
170°25
Which of the following could be the measure of the angle below?
A
–180°B
–120°C
140°D
510°Did you find these answers helpful?
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