Find 
at time 
for the space curve 
. Round your answer to three decimal places.
?
A. 0.796
B. 0.383
C. 0.766
D. 1.868
E. 0.808
Answer: D
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Solve the problem.A rectangular plot of land has a length of 
km and a width of 
km. What is the area of this plot?
A. 
square km
B. 
square km
C. 
square km
D. 
square km
Express the sum or difference as a product.cos 4x + cos 2x
A. 2 sin 3x sin x B. 2 cos 3x sin x C. 2 cos 3x D. 2 cos 3x cos x
For the pair of functions, perform the indicated operation.f(x) = 7 - 8x, g(x) = -4x + 8
Find (f + g)(x).
A. -12x + 15 B. -4x + 15 C. 3x D. -4x + 7
Rewrite the equation in standard form. Find the center and radius of the circle.x2 + y2 + 8x - 65 = 0
A. (x - 4)2 + y2 = 81 center (4, 0), r = 9 B. x2 + (y + 4)2 = 81 center (0, -4), r = 9 C. (x + 4)2 + y2 = 81 center (4, 0), r = 9 D. (x + 4)2 + y2 = 81 center (-4, 0), r = 9