Find the equation of the ellipse satisfying the given conditions. The center is at the origin.Vertex (0, -10), focus (0, 8)
A. 100x2 + 36y2 = 6500
B. 100x2 + 36y2 = 3600
C. 100x2 + 36y2 = 10,064
D. 100x2 + 36y2 = 10,100
Answer: B
Mathematics
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A. 
B. 
C. 
D. 
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A. (x - 5)2 + (y + 1)2 = 169 B. (x + 1)2 + (y - 5)2 = 13 C. (x - 1)2 + (y + 5)2 = 13 D. (x + 5)2 + (y - 1)2 = 169
Mathematics
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where H+ represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. 3 B. -11 C. -3 D. 11
Mathematics
Solve.log3 1 = x
A. 9 B. 0 C. 3 D. 1
Mathematics