Solve the triangle.A = 53°, B = 65°, a = 7
A. C = 62°, b ? 7.9, c ? 6.8
B. C = 28°, b ? 6.2, c ? 6.8
C. C = 62°, b ? 6.2, c ? 6.8
D. C = 62°, b ? 7.9, c ? 7.7
Answer: D
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Solve the problem.The length of the ellipse x = a cos t, y = b sin t, 0 ? t ? 2? is Length = 4a
where e is the ellipse's eccentricity.Use Simpson's Rule with n = 6 to estimate the length of the ellipse when a = 2 and e = 
.
A. 11.8956 B. 12.1751 C. 11.2546 D. 12.2097
Combine like terms.9x - 12x - y
A. -3xy B. -3x - y C. -4x D. -2x
Factor completely. If the polynomial cannot be factored, say it is prime.8x4 - x
A. x(2x - 1)(4x2 + 1) B. x(2x - 1)(4x2 + 2x + 1) C. x(2x + 1)(4x2 - 2x + 1) D. x(8x - 1)(x2 + 2x + 1)
Solve the problem.In economics, functions that involve revenue, cost and profit are used. Suppose R(x) and C(x) denote the total revenue and the total cost, respectively, of producing a new high-tech widget. The difference 
represents the total profit for producing x widgets. Given R(x) = 60x - 0.4 x2 and 
find the equation for P(x).
A. P(x) = -0.4 x2 + 63x + 13 B. P(x) = 3x + 13 C. P(x) = -0.4 x2 + 57x - 13 D. P(x) = 60x - 0.4 x2