Express the number in scientific notation.2500
A. 2.5 × 10-2
B. 2.5 × 10-3
C. 2.5 × 103
D. 2.5 × 102
Answer: C
Mathematics
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At what points is the given function continuous?f(x, y) = 
A. All (x, y) such that x + y ? 0 B. All (x, y) such that 3x + 3y ? 0 C. All (x, y) D. All (x, y) such that 3x + 3y ? 0
Mathematics
Rewrite in exponential form.log2 1 = 0
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Solve the problem.The profit made when t units are sold, t > 0, is given by 
Determine the number of units to be sold for which P < 0 (a loss is taken).
A. 10 < t < 12 B. t > 0 C. t < 10 or t > 12 D. t = 10 or t = 12
Mathematics