Solve the problem.A pharmaceutical company claims that the concentration of a drug in a patient's bloodstream will be at least 25% for 8 hours. Suppose that clinical tests show that the concentration of the drug (as a percent) t hours after injection is given by 
During what time period is the concentration at least 25%?
A. 1 hours ? t ? 5 hours
B. 0 hours ? t ? 8 hours
C. 1 hours ? t ? 9 hours
D. 2 hours ? t ? 10 hours
Answer: A
Mathematics
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For the given function f(x), find f-1(x).f(x) = x + 6
A. f-1(x) = 
B. f-1(x) = -x + 6
C. f-1(x) = x - 6
D. f-1(x) = 6 - x
Mathematics
Provide an appropriate response.Use unity ratios to change 3.5 days into minutes.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Find an equation of variation in which the following are true.y varies jointly as x and z; y = 360 when x = 12 and z = 24
A. y = 
B. y = 
C. y = 
xz
D. y = 103680xz
Mathematics
Provide an appropriate response.Explain why the expressions 
and 
are opposites.
What will be an ideal response?
Mathematics