Provide an appropriate response.Areas of complicated regions are estimated by filling in with shapes whose area is easy to compute. The shape that is most often used in defining the definite integral is ? .
A. the rectangle
B. the square
C. the circle
D. the triangle
Answer: A
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Calculate the flux of the field F across the closed plane curve C.F = xi + yj; the curve C is the closed counterclockwise path around the rectangle with vertices at 
and 
A. 0 B. 149 C. 51 D. 140
Determine the number of significant digits in the given approximate number.70,010
A. 2 B. 3 C. 5 D. 4
Find the extreme values of the function subject to the given constraint.
A. Maximum: 18 at 
minimum: -18 at 
B. Maximum: 9 at 
minimum: -9 at 
C. Maximum: 18 at 
minimum: -9 at 
D. Maximum: 9 at 
minimum: -18 at 
Identify the sampling technique used to obtain a sample.Of all the fishermen on a lake, the game warden chooses to check the fishing license only of the first person that returns to the boat dock.
A. Systematic sampling B. Cluster sampling C. Convenience sampling D. Stratified sampling