Indicate whether the function is one-to-one.C = {(1, -4), (4, -1), (-2, 5), (2, -5)}
A. No
B. Yes
Answer: B
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Solve the problem. Round to tenths where necessary.S(x) = -x3 - 45x2 + 525x + 1429, 0 ? x ? 15 is an approximation to the number of salmon swimming upstream to spawn, where x represents the water temperature in degrees Celsius. Find the temperature that produces the maximum number of salmon.
A. 12.5°C B. 5°C C. 0°C D. 10°C
Find the vertices and foci of the ellipse. Graph the ellipse.4x2 + 36y2 = 144
A. Foci at (0, -6) and (0, 6)
Vertices at (0, -36), (0, 36)
B. Foci at (-6, 0) and (6, 0)
Vertices at (-36, 0), (36, 0)
C. Foci at (- 4
, 0) and (4
, 0)
Vertices at (-6, 0), (6, 0)
D. Foci at (0, - 4
) and (0, 4
)
Vertices at (0, -6), (0, 6)
Use a graph to estimate the solution.During the month of January 1997, the depth, d, of snow in inches at the base of one ski resort could be approximated by 
where t is the number of days since December 31st. Graph the equation and use the graph to estimate the depth of snow on January 24th.
A. 40 inches B. 24 inches C. 21 inches D. 16 inches
Graph the function.y = 
sin(x + ?)
A. 
B. 
C. 
D. 