Simplify. Assume variables represent nonnegative values.
A. xy
B. x
C. xy
D. xyz
Answer: A
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Solve the problem.The amount of alcohol in the bloodstream, A, declines at a rate proportional to the amount, that is, 
. If 
for a particular person, how long will it take for his alcohol concentration to decrease from 0.10% to 0.05%? Give your answer to the nearest tenth of an hour.
A. 2.3 hr B. 3.5 hr C. 4.6 hr D. 0.2 hr
Convert as indicated.7 lb to grams
A. 3255.0 g B. 2940.0 g C. 3178.0 g D. 3136.0 g
Solve the problem.In a state with a population of 7,000,000 the average citizen spends $6,000 on housing each year. What is the total spent on housing for the state? Express answer in scientific notation.
A. $4.2 × 109 B. $42 × 1011 C. $42 × 1010 D. $4.2 × 1010
Determine whether the players have equal probabilities of winning.Toss two fair dice numbered 1 through 6. If the sum is 4, player 1 wins; if the sum is 10, player 2 wins.
A. Yes B. No