Find the length of the curve.x = 3 sin t - 3t cos t, y = 3cos t + 3t sin t, 0 ? t ? 
A. 
?2
B. 
?
C. 
?2
D. 
?2
Answer: D
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Solve the problem.The function f computes the annual interest paid on savings of x dollars with an interest rate of 8%. The graph of f and the horizontal line 
are shown in the figure. Determine the x-values that satisfy (i) the equation f(x) = 3.36 and (ii) the equation f(x) > 3.36. Express your answers symbolically. 
A. {x|x = 42}; {x|x > 42} B. {x|x = 42}; {x|x ? 42} C. {x|x < 42}; {x|x > 42} D. {x|x < 42}; {x|x ? 42}
Use Heron's formula to find the area of the triangle. Round to the nearest square unit.a = 11 meters, b = 15 meters, c = 6 meters
A. 14 square meters B. 58 square meters C. 56 square meters D. 28 square meters
Graph the parabola. State the vertex of the parabola.x = y2 - 4y + 4
A. vertex (2, 0)
B. vertex (0, -2)
C. vertex (-2, 8)
D. vertex (0, 2)
Solve the problem.A theater has 32 rows with 22 seats in the first row, 25 in the second row, 28 in the third row, and so forth. How many seats are in the theater?
A. 2240 seats B. 4480 seats C. 2192 seats D. 4384 seats