Convert the equation given in rectangular form into polar form.8x - 3y + 12 = 0
A. r = 
B. 8 cos ? - 3 sin ? = 12
C. 8 cos ? - 3 sin ? = -12
D. r = 
Answer: D
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Find the area of the region specified in polar coordinates.the region enclosed by the curve r = 9 + cos ?
A. 82?
B. 
?
C. 41?
D. 
?
Find an approximate value for the integral, using the trapezoidal rule with n intervals. Round the answer to the nearest tenth if necessary.
, n = 3
A. 4.7 B. 9.4 C. 6.8 D. 0.6
Find the center (h, k) and radius r of the circle. Graph the circle.2x2 + 2y2 - 8x + 16y + 22 = 0
A. (h, k) = (-2, 4); r = 3
B. (h, k) = (2, -4); r = 3
C. (h, k) = (2, -4); r = 9
D. (h, k) = (-2, 4); r = 9
The ? shape in the figure below is shown using 9 pixels in a 3 × 3 grid. The color levels are given to the right of the figure. Use the matrix 
that represents a digital photograph of the ? shape to solve the problem.
Using the same color levels from the instructions, write a 3 × 3 matrix A that represents the letter L in dark grey on a white background. Then find a 3 × 3 matrix B so that A + B lightens only the letter L from dark grey to light grey.
A.
A = 
; B = 
B.
A = 
; B = 
C.
A = 
; B = 
D.
A = 
; B = 