Find an equivalent equation in rectangular coordinates.r = 10 sin ?
A. x2 + y2 = 10x
B. 
= 10y
C. 
= 10x
D. x2 + y2 = 10y
Answer: D
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Determine which values of x and y, if any, are not permissible. f(x, y) = 
A. x ? 0 B. y ? -4 C. x ? 3 and x ? -3 D. All values of x and y are permissible.
A bus company operates four bus routes (A, B, C, and D) and 50 buses. The buses are apportioned among the routes on the basis of average number of daily passengers per route which is given in the following table.
The standard quota of Route A (to 2 decimal places) is
A. 12.78. B. 7.14. C. 63.88. D. 6.39. E. none of these
The given pattern continues. Write down the nth term of the sequence suggested by the pattern.8, 20, 32, 44, 56, ...
A. an = 4n - 12 B. an = 12n - 1 C. an = 8(12)n-1 D. an = 4(3n - 1)
Perform the indicated operation. Give answers in rectangular form expressing real and imaginary parts to four decimal places.[5(cos 20° + i sin 20°)][4(cos 10° + i sin 10°)]
A. 17.3205 + 10.0000i B. 0.5000 + 0.8660i C. 0.8660 + 0.5000i D. 10.0000 + 17.3205i