Solve the problem.The amount of a certain drug in the bloodstream is modeled by the function 
, where y0 is the amount of the drug injected (in milligrams) and t is the elapsed time (in hours). Suppose that 10 milligrams are injected at 10:00 A.M. If a second injection is to be administered when there is 1 milligram of the drug present in the bloodstream, approximately when should the next dose be given? Express your answer to the nearest quarter hour.
A. 5: 30 P.M
B. 3:45 P.M
C. 12:30 P.M
D. 5:45 P.M
Answer: B
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Solve the problem.The Gray Stone Rock Band will give 10 performances this season. Four of these will be only songs from the 70s. If Tony gets to pick two tickets at random, what is the probability that he will get both 70s tickets?
A. 
B. 
C. 
D. 
Solve the problems.One year ago, Tony and May bought a house. In the year since they bought the house, it has depreciated 2% from the amount they paid. Today it is valued at $143,690. How much did they pay for the house?
A. $146,612 B. $146,522 C. $146,622 D. $147,622
Use Bayes' rule to find the indicated probability.Quality Motors has three plants. Plant 1 produces 35% of the car output, plant 2 produces 20% and plant 3 produces the remaining 45%. One percent of the output of plant 1 is defective, 1.8% of the output of plant 2 is defective and 2% of the output of plant 3 is defective. The annual total production of Quality Motors is 1,000,000 cars. A car chosen at random from the annual output and is found defection. What is the probability that it came from plant 2?
A. 0.35 B. 0.559 C. 0.224 D. 0.217
Solve the problem.If (1, 5) is the endpoint of a line segment, and (4, 6) is its midpoint, find the other endpoint.
A. (3, 11) B. (-5, 3) C. (7, 4) D. (7, 7)