Convert the polar equation to rectangular form. Identify the curve.r = 10 sin ?

A.  = 10y; a circle centered at (0, 5) with radius 5
B.  = 10x; a circle centered at (5, 0) with radius 5
C. x2 + y2 = 10x; a circle centered at (5, 0) with radius 5
D. x2 + y2 = 10y; a circle centered at (0, 5) with radius 5


Answer: D

Mathematics

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A. 9 cos-1 
B. cos-1 
C. sin-1  
D.  sin-1 

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Perform the indicated operations and write the result in standard form.(5 + ) (4 + )

A. 14 - 9i
B. 26 + 54i
C. (20 -  )+ (5 + 4 )i
D. (20 +  )- 26i

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Divide and simplify. ÷ 

A.
B.  
C.
D. (z + 3)(z - 8)

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Find the indicated probability.A spinner has regions numbered 1 through 15. What is the probability that the spinner will stop on an even number or a multiple of 3?

A. 12
B.
C.
D.

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