Find the vertices and foci of the ellipse.
+ 
= 1
A. Vertices: (±15, 0); Foci: (±9, 0)
B. Vertices: (±15, 0); Foci: (±12, 0)
C. Vertices: (0, ±15); Foci: (0, ±12)
D. Vertices: (0, ±15); Foci: (0, ±9)
Answer: B
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Solve the inequality. Write the solution set in interval notation and graph it.-4t - 2 ? -5t - 10
A. (-?, -8]
B. (-4, ?)
C. [-8, ?)
D. (-?, -4)
Solve the given differential equation. (The form of yp is given.)25D2y - y = sin x (Let yp = A sin x + B cos x.)
A. y = c1ex/5 + c2e-x/5 - 
sin x
B. y = c1ex/5 + c2e-x/5 - 
cos x
C. y = c1ex/5 + c2e-x/5 + 
sin x
D. y = c1ex/5 + c2e-x/5 - 
sin x + 
cos x
Provide an appropriate response.Discuss the graph of the equation 
+ 
= 1 if a = b.
What will be an ideal response?
Solve the problem.The revenue in dollars from the sale of concert tickets at x dollars each is given by the function 
Find the difference quotient when x = 24 and h = 0.1. Interpret the result.
A. At 24 per ticket, revenue is decreasing at $605 per dollar change in ticket price. B. At 24 per ticket, revenue is increasing at $605 per dollar change in ticket price. C. At 24 per ticket, revenue is decreasing at $6050 per dollar change in ticket price. D. At 24 per ticket, revenue is increasing at $6050 per dollar change in ticket price.