Solve the problem.Find the area of a sector of a circle of radius 19 inches formed by a central angle of 30°. Round your answer to two decimal places.
A. 9.95 sq in.
B. 4.97 sq in.
C. 189.02 sq in.
D. 94.51 sq in.
Answer: D
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Solve the differential equation.y ' + y tan x = cos x, -?/2 < x < ?/2
A. y = x sin x + c sin x, -?/2 < x < ?/2 B. y = x sin x + c cos x, -?/2 < x < ?/2 C. y = x cos x + c sin x, -?/2 < x < ?/2 D. y = x cos x + c cos x, -?/2 < x < ?/2
Graph the hyperbola.25y2 = 4x2 + 100
A. 
B. 
C. 
D. 
Use the vertex and intercepts to sketch the graph of the equation. Give the equation for the parabola's axis of symmetry.x = -2(y + 4)2 - 4
A. Axis of symmetry is y = 4.
B. Axis of symmetry is y = -4.
C. Axis of symmetry is x = 4.
D. Axis of symmetry is x = -4.
Solve the problem.An employee was paid $20,625 during the first half of last year. During the second half he was paid $40,858. How much more was his income during the second half?
A. $61,473 B. $20,233 C. $20,223 D. $61,483