Describe the graph of the polar equation. r = 40 sin ?
A. Circle with radius 20 and center (0, 20)
B. Horizontal line passing through (0, 40)
C. Parabola opening upward with vertex at (0, 20)
D. Ellipse centered at the origin with intercepts (±1, 0) and (0, ±20)
Answer: A
Mathematics
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Graph the following line.Through (9, 0), m = - 
A. 
B. 
C. 
D. 
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Sketch the graph and find the area of the region bounded by the graph of the function f and lines 
, 
and 
.
?
?
A. ?
sq units.
?
B. ?
sq units.
?
C. ?
sq units.
?
D. ?
sq units.
?
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Solve.The number of students in a school in year n is estimated by the model
. About how many students are in the school in each of the first three years?
A. 102, 139, 168 B. 115, 152, 205 C. 110, 139, 192 D. 102, 139, 192
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Use a half-angle formula to find the exact value of the expression.sin 
A. - 
B. 
C. - 
D. 
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