Select the correct answer. Write (21 − 4i) − (16 + 7i) + 28i as a complex number in standard form. A. 5 + 39i B. 5 + 17i C. 5 −
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Answer:
Option B.
Step-by-step explanation:
It is given that,
Thickness of Each DVD case = 14 mm
Thickness of each layer of padding = 10 mm
Length of the interior of the box = 132 mm
Let d represents the number of DVDs that the distributor can fit into one box with two layers of padding.
Thickness of d DVD cases = 14d mm
Thickness of two layers of padding = 10×2=20 mm
Total thickness of d DVD cases and 2 layers of padding = 14d+20
Total thickness must be less than or equal to 132.
Therefore, the correct option is B.