Evaluate.73
A. 242
B. 243
C. 49
D. 343
Answer: D
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Simplify the expression. Assume all variables represent positive real numbers.
A. -4 B. 16 C. not a real number D. 4
Solve the problem.After an injection, the amount of a medication A in the bloodstream decreases with time t, in hours. Suppose that under certain conditions A is given byA(t) = 
, where A0 is the initial amount of the medication given. Assume that an initial amount of 54.0 cc is injected.Find 
A(t).
A. A0 B. 0 C. 2A0 D. A(t) increases without bound
Solve the problem.Suppose that a weight on a spring has an initial position of 
inches and a period of 
Find a function 
that models the displacement of the weight.
A. s(t) = 6 cos (2?(2.5)t) B. s(t) = 6 cos (2?(0.4)t) C. s(t) = 12 cos (2?(0.4)t) D. s(t) = 12 cos (2?(2.5)t)
Solve and check. Begin by using the addition or multiplication principles of equality to isolate the squared term. 0.6x2 - 0.3 = 0.186
A. ±0.19 B. no real solution C. ±0.81 D. ±0.9