Add and simplify. Write the answer as a mixed number as needed.9
+ 15
A. 25
B. 23
C. 24
D. 9
Answer: C
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Solve.The function N(t) = 
, t ? 8gives the body concentration N(t), in parts per million, of a certain dosage of medication after time t, in hours.Graph the function on the interval [8, ?) and complete the following:N(t) ? 
as t ? ?.
A. 
N(t) ? 0.1 as t ? ?.
B. 
N(t) ? 1 as t ? ?.
C. 
N(t) ? 0 as t ? ?.
D. 
N(t) ? 0.086 as t ? ?.
Determine the coordinates of the vertex by completing the square.f(x) = -x2 + 14x + 2
A. (14, 2) B. (-7, -145) C. (-7, -47) D. (7, 51)
Convert to an exponential equation.log4 
= -2
A. 
2 = 4
B. 4-2 = 
C. 416 = 2
D. 24 = 
Solve the problem.The roof of a building is in the shape of the hyperbola 
where x and y are in meters. Refer to the figure and determine the height h of the outside walls.
a = b = 8 m
A. 17 m B. 39 m C. 111 m D. 10.5 m