One morning 30 employees were in the company cafeteria. Fifteen used cream in their coffee, 20 used sugar and 10 used both. Determine if the events "used cream" and "used sugar" are independent.
A. Independent
B. Dependent
Answer: A
Mathematics
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Find the equation of the indicated least-squares curve. Sketch the curve and plot the data points on the same graph.For the points on the following table, find the least-squares curve y = mx2 + b.
A. y = 4.14x2 + 1
B. y = 1.07x2 - 0.76
C. y = 2.14x2 - 1.52
D. y = 3.5x2 + 5.9
Mathematics
Use the graph to evaluate the limit.
f(x)
A. 0 B. 1 C. Does not exist D. -1
Mathematics
Solve the problem.How many spanning trees does the following network have?
A. 5 B. 3 C. 4 D. 8 E. none of these
Mathematics
Find the domain of the function.f(x) = 
+ 5
A. 
, or 
B. 
, or 
C. 
, or 
D. 
, or 
Mathematics