Find the weighted mean of the numbers in the table. Round to the nearest tenth.At a supermarket during the 6 p.m. rush, the manager counted the number of customers waiting in each of the 12 checkout lines. The results are shown in the table. 
A. 4.3 customers
B. 4.5 customers
C. 5.8 customers
D. 5.2 customers
Answer: A
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Use the graph to determine the function's domain and range.
A. domain: [2, 4] range: (-?, ?) B. domain: [0, 4] range: (-?, ?) C. domain: (-?, ?) range: [0, 4] D. domain: (-?, ?) range: [2, 4]
Find the domain of the rational function.f(x) = 
A. all real numbers B. {x|x ? 1} C. {x|x ? -1} D. {x|x ? 0}
Evaluate without using a calculator by using ratios in a reference triangle.sec 
A. - 
B. -1
C. - 
D. - 
Using the derivative of f(x) given below, determine the intervals on which f(x) is increasing or decreasing.f'(x) = x1/3(x - 4)
A. Decreasing on (0, 4); increasing on (-?, 0) ? (4, ?) B. Increasing on (0, ?) C. Decreasing on (0, 4); increasing on (4, ?) D. Decreasing on (-?, 0) ? (4, ?); increasing on (0, 4)