Solve the problem. Round to the nearest dollar or tenth of a percent when necessary.A store sells an item for $460 each. If this is a 68.9% markup on the selling price, find the equivalent markup percent on cost.
A. 221.5%
B. 40.8%
C. 131.2%
D. 460%
Answer: A
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Evaluate the work done between point 1 and point 2 for the conservative field F.F = 3xi + 3yj + 3zk; P1(3, 1, 4) , P2(6, 3, 8)
A. W = - 
B. W = 
C. W = 
D. W = 0
Round the number to the nearest thousandth, nearest hundredth, and nearest tenth. Remember to round from the original number.86.412
A. 86.41, 86.4, 86 B. 86.412, 86.41, 86.4 C. 86.413, 86.42, 87 D. 86.42, 86.5, 87
Find the product and write the result in standard form.(2 - 8i)2
A. -60 B. 68 - 32i C. -60 - 32i D. 4 - 32i + 64i2
Solve the problem.A drug is injected into a patient and the concentration of the drug is monitored. The drug's concentration, 
in milligrams after t hours is modeled by 
Estimate the drug's concentration after 5 hours. (Round to the nearest hundredth.)
A. 1.39 mg B. 0.44 mg C. 1.51 mg D. 0.32 mg