Use the principle of estimation to find an estimate for the calculation.625,381 × 793
A. 420,000,000
B. 560,000,000
C. 480,000,000
D. 42,000,000
Answer: C
Mathematics
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and on top by the paraboloid 
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.
A. 
B. 
C. 
D. 
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Solve the problem.If v = -2i - 4j + k and u = 2i - 5j + 5k, find a vector perpendicular to both v and u.
A. 20i + 27j + 19k B. 7i + 3j + 26k C. -15i + 12j + 18k D. -7i - 3j + 3k
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Evaluate the expression.9-1 + 7-1
A. 
B. 2
C. 
D. 
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Solve the problem.Jeff studied math for 
history for 
and physics for 
How long did he study?
A. 
hr
B. 
hr
C. 10
hr
D. 2
hr
Mathematics