Perform the row operation(s) on the given augmented matrix.R1 = 
r1
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve. Use ? ? 3.14 and round to the nearest hundredth.The sound of an explosion at a fireworks factory was heard 27 miles away in every direction. How many square miles are in the area where people heard the explosion?
A. 9156.24 ft2 B. 169.56 ft2 C. 84.78 ft2 D. 2289.06 ft2
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Read the following water meter, electric meter, and dial gauge.
A. 7083 kWh B. 7973 kWh C. 8083 kWh D. 7073 kWh
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Solve the problem.Which data set given below has the largest standard deviation?
A. {3, 4, 5, 6, 7} B. {1, 1, 5, 9, 9} C. {3, 4, 6, 6, 6} D. {2, 4, 5, 6, 8} E. {3, 3, 5, 7, 7}
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Write the number in standard form.Six hundred thirty-eight thousand, nine hundred ninety-seven
A. 638,997,000 B. 638,977 C. 638,000 D. 638,997
Mathematics