Find the vertices of the hyperbola.4x2 - 9y2 = 36
A. (-2, 0), (2, 0)
B. (0, 2), (0, -2)
C. (0, 3), (0, -3)
D. (-3, 0), (3, 0)
Answer: D
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Perform the indicated operations, expressing the answer in simplest form with rationalized denominators.
A. 2yz2
B. 128y7z9
C. 128yz 
D. 2yz 
Perform the indicated operation.7 + (-19)
A. -12 B. 12 C. -26 D. 26
Without graphing the function, determine its amplitude or period as requested.y = -5 cos 
xFind the amplitude.
A. 
B. 4?
C. 5
D. 
Solve the problem.The population of country A in millions is modeled by 
During the same time period, the population of country B in millions is modeled by 
In both formulas x is the number of years. Assuming these trends continue, estimate what the population will be when the populations are equal. Round to the nearest million.
A. 17 million B. 1 million C. 18 million D. 19 million