Find the function value using a calculator set in RADIAN mode. Round the answer to four decimal places, where approximate.cos 2.44
A. -0.7638
B. -0.4456
C. 0.7638
D. 0.4456
Answer: A
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?Which of the following is true about similar polygons?
A. ?The AA Postulate can be used to prove similarity between polygons. B. ?For any polygon with n-sides, if n - 1 angles are equal, then the polygons are similar. C. ?For any polygon with n-sides, if n - 1 sides are proportional to each other, then the polygons are similar. D. ?All similar polygons are congruent. E. ?All congruent polygons are similar. F. ?b and e are true.
Name the curve with the given polar equation. If it is a conic, give its eccentricity. r = 32 sin ?
A. Circle with radius 16 and center (16, 0) B. Horizontal line passing through (0, 32) C. Parabola opening upward with vertex at (0, 16) D. Circle with radius 16 and center (0, 16)
Determine convergence or divergence of the alternating series.
A. Converges B. Diverges
Solve the problem.The line graph shows the cost of inflation. What cost $5000 in 1980 would cost the amount shown by the graph in subsequent years. 
Below are two mathematical models for the data shown in the graph. In each formula, C represents the cost x years after 1985 of what cost $5000 in 1980. Model 1: C = 798x + 17,521 Model 2: C = -x2 + 820x + 18,017(i) Use the graph to estimate the cost in 2000, to the nearest thousand dollars, of what cost $5000 in 1980.(ii) Use model 1 to determine the cost in 2000. How well does this describe your estimate from part (i)?(iii) Use model 2 to determine the cost in 2000. How well does this describe your estimate from part (i)?
A. (i) about $28,000; (ii) about $29,491, reasonably well; (iii) about $28,452, reasonably well B. (i) about $29,000; (ii) about $29,491, reasonably well; (iii) about $30,092, reasonably well C. (i) about $30,000; (ii) about $30,289, reasonably well; (iii) about $30,912, reasonably well D. (i) about $27,000; (ii) about $28,693, reasonably well; (iii) about $29,272, reasonably well