The percent concentration y of a certain drug in the bloodstream at any time t in minutes is given by the equation
. Graph this function with a graphing utility. Which of the following statements best describes the situation after 10 hours?
?
A. After 10 hours, 50% of the drug is in the blood stream.
B. After 10 hours, 10% of the drug is in the blood stream.
C. After 10 hours, there are almost 100 units of the drug in the blood stream.
D. After 10 hours, the drug has almost completely dissipated.
E. After 10 hours, the drug is almost completely in the blood stream.
Answer: E
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Find the indicated term by use of the following information. The r + 1 term of the expansion of (a + b)n is given by 
an - r brThe term involving b9 in (a + b)12
A. 495a3b9 B. 220a3b9 C. a3b9 D. 1980a3b9
Find the values of x for which the equation is true.
- 6 = 1
A. -5, 5 B. -7 C. 7, -7 D. 7
Find the value of the determinant.
A. -16 B. 1 C. 48 D. 0
Solve for the indicated variable.V = 
Bh for h
A. h = 
B. h = 
C. h = 
D. h = 