Solve the rational inequality.
> 0
A. 
B. 
C. 
D. (0, ?)
Answer: A
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Solve the formula for the specified variable.a + b = s + r for r
A. r = 
+ b
B. r = a + b - s
C. r = 
D. r = s(a + b)
Solve the problem. Round to the nearest tenth when necessary.A comet follows the hyperbolic path described by 
where x and y are in millions of miles. If the sun is the focus of the path, how close to the sun is the vertex of the path?
A. 4.2 million mi B. 6.5 million mi C. 30 million mi D. 1.2 million mi
Express as a single logarithm.3 loga (2x + 1) - 2 loga (2x - 1) + 2
A. loga 
B. loga (2x + 3)
C. loga 2(x + 1)
D. loga (2x + 1) + 2
Find the correlation coefficient.The following are costs of advertising (in thousands of dollars) and the number of products sold (in thousands): 
A. 0.7077 B. 0.2353 C. 0.2456 D. -0.0707