The graph of a function f is given. Use the graph to answer the question.For which of the following values of x does f(x) = 40?
A. 140
B. 80
C. 40
D. 100
Answer: B
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Write the given iterated integral as an iterated integral with the order of integration interchanged.
A. 
B. 
C. 
D. 
Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the y-axis.y = 6
, y = 0, x = 1
A. 
?
B. 30?
C. 
?
D. 12?
Use multiplication shortcuts to find the product.20 × 4 × 5
A. 40 B. 4000 C. 500 D. 400
Solve the problem.Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 40 seconds, while Melissa's car completes a revolution in 35 seconds. How long will it take them before both cars reach the starting point again simultaneously?
A. 560 sec B. 280 sec C. 112 sec D. 56 sec