Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. 
B. 
C. 21
D. 
Answer: D
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Solve the problem.Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a 70-hour review course average a score of 749. Find a linear equation which expresses score, S, in terms of time, t. Use this equation to predict an average score for persons taking a 41-hour review course. Round your answer to the tenths place.
A. 669.5 B. 655.5 C. 659.7 D. 648.2
Determine convergence or divergence of the series.
A. Converges B. Diverges
Find fraction notation for the percent notation in the problem.Sales of a particular product increased 15% over last year's sales of the product.
A. 
B. 
C. 
D. 
Solve the problem.Mary and her brother John collect foreign coins. Mary has twice the number of coins that John has. Together they have 135 foreign coins. Find how many coins Mary has.
A. 18 coins B. 45 coins C. 90 coins D. 81 coins