Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log4
A. 8 - 
log4x
B. 
log4x - 2
C. log4x - 2
D. - 2log4x
Answer: B
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Match the description with the correct symbolic expression.a linear function whose graph has y-intercept -4
A. y = -4x + 4 B. -4x + 11y = 4 C. f(x) = -8x - 4 D. x = -4
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: 30 P.M B. 5:45 P.M C. 12:30 P.M D. 3:45 P.M
Sketch the graph of the function below, being sure to include at least two full periods.
?
y = - cos(x+
)
?
A. ?
B. ?
C. ?
D. ?
E. ?
Find the vertex and axis of symmetry of the graph of the function.f(x) = x2 + 1
A. vertex: (-1, 0); x = -1 B. vertex: (1, 0); x = 1 C. vertex: (0, 1); x = 0 D. vertex: (0, -1); x = 0