Rewrite the expression in terms of exponentials and simplify the results. ln (cosh 9x - sinh 9x)
A. -9
B. ln (e9x - e-9x)
C. -9x
D. -18x
Answer: C
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Write the standard form of the equation of the circle with center (5, -7) and radius 5. ?
A. ?
B. 
C. 
D. 
E. 
Solve the problem.A museum curator collects fossils from two different periods. He has 500 from one period and 255 from a later period. He plans to arrange the fossils in display cases so that each case contains the same number of fossils. Also, each case must contain fossils from only one period. What is the largest number of fossils that can be placed in each case?
A. 255 B. 25,500 C. 500 D. 5
Sketch the curve of the vector function r(t) = 5sinti + 6costj, and indicate the orientation of the curve.
What will be an ideal response?
Find all values of ? in [-4?, 4?] satisfying each of the following equations. cos ? = 1
A. ? = -4?, -2?, 0, 2?, 4? B. ? = 0, 2?, 4? C. ? = -4?, -2?, 2?, 4? D. ? = -3?, -?, ?, 3?