Decide whether the given sequence is finite or infinite.a1= 3, a2= 8; for 3 ? n ? 10, an= 4?an-1+ 7?an-2
A. Finite
B. Infinite
Answer: A
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Solve.The orbit of a planet, in a galaxy far, far away, is an ellipse. If the center of the ellipse is at the origin, an approximate equation for the orbit is 
+ 
= 1, where x and y are measured in millions of miles. Find the largest possible distance across the ellipse. Round the answer to the nearest million miles.
A. 13,710 million miles B. 117 million miles C. 83 million miles D. 166 million miles
Solve the problem.In September 1998 the population of the country of West Goma, in millions was modeled by 
At the same time the population of East Goma, in millions was modeled by 
In both formulas x is the year, where 
corresponds to September 1998. Assuming these trends continue, estimate what the population will be when the populations are equal.
A. 1 million B. 17 million C. 18 million D. 19 million
Use the Binomial Theorem to expand the binomial.(x+ 2y)4
A. x4 + 8x3y + 24x2y2 + 8xy3 + 16y4 B. x4 + 4x3y + 6x2y2 + 4xy3 + y4 C. x4 + 2x3y + 24x2y2 + 16xy3 + 16y4 D. x4 + 8x3y + 24x2y2 + 32xy3 + 16y4
Solve and graph.5x - 2 ? -7 and 5x + 1 ? 21
A. [-1,4]
B. (-?, -1] ? [4, ?)
C. [4, ?)
D. [-1, ?)