Solve the problem.9 students arrive at an outdoor center for the day. How many ways can 2 students be chosen to go kayaking and 4 to go rock climbing?
A. 1260
B. 40,320
C. 30,240
D. 15,120
Answer: A
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Simplify the expression. ? 23 - 2·4 ?
A. 84 B. 4 C. –15 D. 15 E. 8
Provide an appropriate response.If the series 
is integrated twice term by term, for what value(s) of x (if any) does the new series converge and for which the given series does not converge?
A. x = 6 B. x = 8 C. none D. x = 6, x = 8
Replace the polar equation with an equivalent Cartesian equation.r = 
A. 8y - 9x = 1
B. 
+ 
= 1
C. 
= 1
D. 8x - 9y = 1
Find the foci and endpoints of each axis for the given ellipse.
+ y2 = 1
A. Foci: (±
, 0); vertices: (± 14 , 0);
endpoints of the minor axis: (0, ± 1)
B. Foci: (± 143, 0); vertices: (± 144 , 0);
endpoints of the minor axis: (0, ± 1)
C. Foci: (±
, 0); vertices: (± 12, 0);
endpoints of the minor axis: (0, ± 1)
D. Foci: (0 , ±
); vertices: (± 12, 0);
endpoints of the minor axis: (± 1, 0)