Solve the problem.Solve the formula a + b = s + r for r.
A. r = a + b - s
B. r = s(a + b)
C. r = 
+ b
D. r = 
Answer: A
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Use a tree diagram showing all possible results when four fair coins are tossed. Then list the ways of getting the indicated result.the same outcome on the first two coins
A. hhhh, hhht, hhth, hhtt, tthh, ttht, ttth, tttt B. hhhh, hhht, hhth, hthh, hhtt, tthh, ttht, ttth, tttt C. hhhh, hhht, hhtt, tthh, ttht, ttth, tttt D. hhhh, hhht, hhth, hhtt
Find the coordinates of the centroid of the given figure. Each region is covered by a thin, flat plate.The region bounded by y = x2 and y = 3
A. 
B. 
C. 
D. 
Find the limit of the sequence if it converges; otherwise indicate divergence.an = 
n
A. e6 B. 6 C. 0 D. Diverges
Solve the problem.The ferris wheel in the figure has a radius of 42 meters. The distance between the top of the ferris wheel and the ground is 91 meters. The rectangular coordinate system shown has its origin on the ground directly below the center of the wheel. Use the coordinate system to write the equation of the circular wheel.
A. x2 + (y - 49)2 = 842 B. x2 + y2 = 422 C. x2 + (y - 49)2 = 422 D. x2 + (y + 49)2 = 422