The given triangles are similar. Find the unknown length n. Be sure to include units in the answer.
A. 0.4225 yd
B. 10 yd
C. 4 yd
D. 1 yd
Answer: D
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Factor.15z4 + 2z2 - 8
A. (5z2 + 4)(3z2 - 2) B. (3z4 + 2)(5z - 4) C. (5z4 + 4)(3z - 2) D. (3z2 + 2)(5z2 - 4)
Find the indicated control limits.For a production process for which there is a great deal of data since its last modification, the population mean ? and the population standard deviation ? are assumed known. For such a process we have the following values for an 
chart: 
(The value A is found in the table of control chart factors).In a chalk-producing factory, after production, the length of six sample pieces of chalk is checked every 15 minutes. For this process, ? = 3.67 in. and ? = 0.12 in. Find the central line, UCL, and LCL for the mean.
A. 3.67, 3.817, 3.523 B. 3.67, 3.806, 3.534 C. 3.67, 3.831, 3.509 D. 3.67, 3.728, 3.612
For the following question(s), refer to the digraph below.
Vertex D is
A. incident to vertex C only. B. incident to vertex B only. C. incident to vertices E and B. D. incident to vertex E only. E. none of these
Simplify the square root.
A. 8.062
B. -65
C. 65
D. 