Solve the triangle.
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Apply the rules regarding the use of significant digits after all computations are complete.
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A. 
B. ?
C. ?
D. ?
E. ?
Answer: D
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Determine the symmetries of the curve.r = 2 + 3 cos ?
A. Origin only B. x-axis only C. y-axis only D. No symmetry
Use inductive reasoning to find the next equation in the pattern.12= 1 ? 112 + 12= 1 ? 212 + 12 + 22= 2 ? 3
A. 12 + 12 + 22 + 22 = 2 ? 5 B. 12 + 12 + 22 + 32 + 52 = 5 ? 8 C. 12 + 22 + 32 = 2 ? 7 D. 12 + 12 + 22 + 32 = 3 ? 5
Solve the problem.Find the centroid of the region in the first quadrant bounded by the curve y = 3 cos x and the axes.
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Answer the question(s) based on the following situation: Over the last 80 years records have been kept of the annual rainfall in the Tasmanian desert. The distribution of annual rainfall is approximately normal and has no outliers. The minimum of 2.5 inches of rain occurred in 1959; the maximum of 9.7 inches of rain occurred in 1938.What is the approximate average annual rainfall over the last 80 years?
A. 4.3 inches B. 5.2 inches C. 3.2 inches D. 6.1 inches E. none of these