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. 12:30 P.M
B. 5:45 P.M
C. 3:45 P.M
D. 5: 30 P.M
Answer: C
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State the domain of the given function.f(x) = 
A. All real numbers except -8 B. All real numbers C. All real numbers except 8 D. All real numbers x > 8
Find the second derivative.y = 5x2 + 6x - 8
A. 5 B. 10 C. 10x + 6 D. 0
Write the augmented matrix for the system. 8x + 2z = 46 3y + 7z = 20 5x + 7y + 7z = 86
A. 
B. 
C. 
D. 
Find the center, transverse axis, vertices, foci, and asymptotes of the hyperbola.
- 
= 1
A. center at (4, -1)
transverse axis is parallel to x-axis
vertices at (0, -1) and (8, -1)
foci at (4 - 
, -1) and (4 + 
, -1)
asymptotes of y + 1 = - 
(x - 4) and y + 1 = 
(x - 4)
B. center at (4, -1)
transverse axis is parallel to x-axis
vertices at (-1, -1) and (9, -1)
foci at (4 - 
, -1) and (4 + 
, -1)
asymptotes of y + 1 = - 
(x - 4) and y + 1 = 
(x - 4)
C. center at (4, -1)
transverse axis is parallel to y-axis
vertices at (4, -6) and (4, 4)
foci at (4, -1 - 
) and (4, -1 + 
)
asymptotes of y - 1 = - 
(x + 4) and y - 1 = 
(x + 4)
D. center at (-1, 4)
transverse axis is parallel to x-axis
vertices at (-6, 4) and (4, 4)
foci at (-1 - 
, 4) and (-1 + 
, 4)
asymptotes of y - 4 = - 
(x + 1) and y - 4 = 
(x + 1)