Find the value of r and determine if a correlation exists at the indicated level of significance.
?? = 0.01
A. r = 0.9418; Correlation does not exist.
B. r = 0.9657; Correlation exists.
C. r = 0.9646; Correlation exists.
D. r = 0.9353; Correlation does not exist.
Answer: C
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Solve the problem.Two plumbers make house calls. One charges $95 for a visit plus $30 per hour of work. The other charges $80 per visit plus $40 per hour of work. For how many hours of work do the two plumbers charge the same?
A. 2 hr B. 1.5 hr C. 0.5 hr D. 1 hr
To answer the following question(s), refer to the Mandelbrot replacement process described by:? Start: Choose an arbitrary complex number s, called the seed of the Mandelbrot sequence. Set the seed s to be the initial term of the sequence 
? Procedure M: To find the next term in the sequence, square the preceding term and add the seed 
If we apply the Mandelbrot replacement process to the seed s = 1 - i, then s1 =
A. 3 - 3i. B. 1 - 3i. C. -1 + i. D. 2 - 2i. E. none of these
Perform long division.
A. 5y + 17 B. 6y - 9 C. 6y + 156 D. 6y + 9
Suppose that the marginal propensity to consume is 
(in billions of dollars), and that consumption is $5.33 billion when disposable income is 0. Find the national consumption function. If it's necessary, round your calculations to four decimal places.
?
A. 
B. 
C. 
D. 
E. 