In a certain city there is a river running through the middle of the city. There are three islands and nine bridges as shown in the figure below.
It is possible to take a walk though this town, starting on the South Bank, crossing each bridge once (and only once) and ending
A. on island C.
B. back on the South Bank.
C. on island B.
D. on the North Bank.
E. none of these
Answer: D
Mathematics
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Evaluate the integral.
A. 
?
B. 
?
C. 
?2
D. 
?2
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Use a calculator to perform the operation. Express your answer in scientific notation.
A. 2.87 × 1027 B. 2.865657742 × 1027 C. 6.62 × 101 D. 2.87 × 1025
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Graph the equation.
?
?
A. ?
B. ?
C. ?
D. ?
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Solve the problem.A repair company's charge for repairing a certain type of copy machine fits the model 
where y is the number of dollars charged and x is the number of minutes the repair person is on the job. How many minutes would it take for the cost of repair to reach $120? (Round to the nearest minute.)
A. 187 min B. 118 min C. 271 min D. 12 min
Mathematics