Solve the problem.If f(?) = cot ? and f(a) = -3, find the exact value of f(a) + f(a + ?) + f(a + 3?).
A. -9
B. -3
C. -9 + 4?
D. undefined
Answer: A
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Find the value of 
a. 0
b. –0.7
c. –0.7
d. –0.6
e. 0.16
Convert the given polar coordinates of the point to rectangular coordinates.
A. 
B. 
C. 
D. 
Give two parametric representations for the equation of the parabola.y = x2 + 4x + 12
A. x = t, y = t2 + 4t + 12 for t in (-?, ?); x = t + 2, y = t2 + 8 for t in (-?, ?) B. x = t, y = t2 - 4t - 12 for t in (-?, ?); x = t + 2, y = t2 + 8 for t in (-?, ?) C. x = t, y = t2 + 4t + 12 for t in (-?, ?); x = t - 2, y = t2 + 8 for t in (-?, ?) D. x = t, y = t2 + 4t + 12 for t in (-?, ?); x = t - 2, y = t2 - 8 for t in (-?, ?)
Find the surface area of the geometric solid. If needed, use 3.14 as an approximation for ? and round the answer to the nearest tenth.Cube: s = 9 ft
A. 648 ft2 B. 486 ft2 C. 243 ft2 D. 729 ft2