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. 5:45 P.M
B. 5: 30 P.M
C. 3:45 P.M
D. 12:30 P.M
Answer: C
Mathematics
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Sketch the graph of the rational function.f(x) = 
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.The single discount equivalent rate of the trade discount 10/15/30 is:
A. 0.4645 B. 0.4500 C. 0.5500 D. 0.4546
Mathematics
Write the equation of the line whose graph is shown.
A. y = 
x - 7
B. y = -5x - 7
C. y = 
x + 5
D. y = 5x - 7
Mathematics
Two people X and Y enter a supermarket. The probabilities that person X and Y will make a purchase are 0.3 and 0.4 respectively. Assume that whether each makes a purchase is independent of whether the other makes a purchase.What is the probability that at least one of the two people described above makes a purchase?
Fill in the blank(s) with the appropriate word(s).
Mathematics