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. 156 million miles
B. 110 million miles
C. 12,144 million miles
D. 78 million miles
Answer: A
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Evaluate the determinant.
A. 16 B. 62 C. -102 D. 102
Add the numbers using the number line.-3 + 0 
A. -30 B. -3 C. 3 D. 0
Many states conduct lotteries; a typical lottery payoff ticket is shown here. Assume there are 20 numbers chosen from a set of 80 possible numbers. What is the expectation for a three-spot game? Assume that the ticket cost $1. 3 SPOT GAMEMATCHPRIZE32$50$5?
A. $0.50 B. - $0.50 C. $0.78 D. - $0.39 E. $0.39
Solve the problem.The logistic function f(t) = 
describes the population of a species of butterflies 
after they are introduced to a non-threatening habitat. How many butterflies are expected in the habitat after 18 months?
A. 1080 butterflies B. 400 butterflies C. 327 butterflies D. 7200 butterflies