The following figure has perimeter, circumference, or area as indicated. Find the value of x. Use 3.14 as an approximation for ?.C = 56.52
A. 9
B. 12
C. 15
D. 6
Answer: D
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Consider the set 
with an operation 
defined by the table.
means find the entry in row a and column b; for example,
data-wiris-created="true" src="https://sciemce.com/media/3/ppg__cognero__5.1_Natural_Numbers__media__9e3c5c13-073e-4c53-aaa5-b04009a5de98.PNG" style="vertical-align: middle;" /> (the entry in row 7 and column 9). Find 
.
1 4 7 9 1 9 7 1 4 4 7 9 4 1 7 1 4 7 9 9 4 1 9 7
Fill in the blank(s) with the appropriate word(s).
Perform the indicated operations and, if possible, simplify.
? 
÷ 
A. 1
B. 
C. 
D. 
Find the vertex, focus, and directrix of the parabola with the given equation.(y + 3)2 = 16x
A. vertex: (0, -3) focus: (4, -3) directrix: x = -4 B. vertex: (0, -3) focus: (-3, -3) directrix: x = -4 C. vertex: (0, 3) focus: (3, 3) directrix: x = -5 D. vertex: (-3, 0) focus: (4, -3) directrix: x = -7
Graph the function.
?
?
A. 
B. ?
C. ?
D. ?