Write 
in expanded form.
?
A. 
B. 
C. 
D. 
Answer: C
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Change the Cartesian integral to an equivalent polar integral, and then evaluate.
A. ?(9 ln 10 - 9) B. ?(10 ln 10 + 9) C. ?(10 ln 10 - 9) D. ?(9 ln 10 + 9)
Solve the problem.Lu Yi walks his dog Sam with a leash of length 3 feet. Sam always walks directly to Lu Yi's right at the end of his leash. If Lu Yi walks once around a rectangle of length L and width W, how much further does Sam walk than Lu Yi? Give an exact answer.
A. 6? ft B. (6? + 2L + 2W) ft C. (3? + L + W) ft D. 3? ft
Solve for x using an equivalent exponential expression.A rubber ice-hockey puck has a 3.3 inch diameter. What is the area of its circular surface? Use 3.14 for ?. Round to the nearest tenth, if necessary.
A. 4.3 sq in. B. 34.2 sq in. C. 10.4 sq in. D. 8.5 sq in.
Solve using Cramer's rule, if possible. If it is not possible, state whether the system is inconsistent or has infinitely many solutions.
A. (-1, 7) B. (1, 7) C. (-7, -1) D. (7, 1)