Find the focus and directrix of the parabola.- 
x2 = y
A. (0, -2); y = -2
B. (-4, 0); x = 2
C. (0, 2); y = -2
D. (0, -2); y = 2
Answer: D
Mathematics
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Let A and B be sets with cardinal numbers, n(A) = a and n(B) = b, respectively. Decide whether the statement is true or false.n(A ? B) = n(A) + n(B) - n(A ? B)
A. True B. False
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Find the limit of the sequence if it converges; otherwise indicate divergence.an = 
A. 0
B. 
C. 1
D. Diverges
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Find the indicated quantities for the appropriate geometric sequence.A town has a population of 1000 people and is increasing by 9% every year. What will the population be at the end of 11 years? Round to the nearest unit.
A. 2580 B. 2813 C. 1990 D. 2367
Mathematics