Write the standard form of the equation of the circle with radius r and center (h, k).r = 4; (h, k) = (0, 0)
A. (x - 4)2 + (y - 4)2 = 4
B. (x - 4)2 + (y - 4)2 = 16
C. x2 + y2 = 4
D. x2 + y2 = 16
Answer: D
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.
A. C = 
x
B. C = 
C. C = 
D. C = - 
Perform the indicated operation and simplify. Write the answer in the form a + bi.9i(6 - 2i)
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A. 156°F B. 161°F C. 181°F D. 195°F