Find the length of the curve.y = 
, 0 ? x ? 
A. 
B. 25
C. 
D. 5
Answer: D
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Use the figure below to answer the following question(s).
Vertex D is adjacent to
A. vertex A, B, and C only. B. vertex B and vertex C only. C. every other vertex. D. vertex B, C, E, F only. E. none of these
Solve the problem.If n(A) = 40, n(B) = 117 and n(A ? B) = 137, what do you know about n(A ? B)?
A. n(A ? B) = 20 B. 60 C. n(A ? B) = 10 D. n(A ? B) = 22
Decide whether the relation is a function, and give the domain and range.
A. Function; domain: (-?, ?); range: (-?, ?) B. Not a function; domain: (-?, ?); range: (-?, ?) C. Not a function; domain: (-?, 0) ? (0, ?); range: (-?, ?) D. Function; domain: (-?, 0) ? (0, ?); range: (-?, ?)
The concentration x of a certain drug in an organ after t minutes is given by 
. Find the concentration of the drug at 20 minutes. Round your answer to four decimal places.
?
A. 0.0600 B. 0.0108 C. -0.0553 D. 0.0692 E. 0.8647