Evaluate. 102
A. 1024
B. 20
C. 121
D. 100
Answer: D
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A farmer wishes to work out the average milk yield in his herd that consists of an equal number of Ayrshire, Friesian, Galloway, and Jersey cows.Suppose the farmer divides up his herd into the four sub-groups and randomly samples 3 cows from each subgroup. What type of sampling is being used?
A. quota sampling B. convenience sampling C. simple random sampling D. capture-recapture E. stratified sampling
Multiply.(x + y - 6)(x + y + 6)
A. x2 + y2 + 2xy + 36 B. x2 + y2 - 36 C. x2 + y2 + 2xy - 36 D. x2 + y2 + 2(xy - 6)
Solve the problem.A research team collected data concerning a local welfare-to-work program. They found that the more frequently a participant attended weekly group support meetings, the longer he or she would keep the same job. The data are summarized in the graph below. Call the function f.
Does f have an inverse? Why or why not?
A. No, because it fails the horizontal line test. B. No, because it fails the vertical line test. C. Yes, because it passes the horizontal line test. D. Yes, because it passes the vertical line test.
Find an equation of the line containing the given pair of points(-4, 0) and (9, 6)
A. y = 
x + 
B. y = 
x + 18
C. y = - 
x + 
D. y = - 
x + 18