<span>If a user name can have seven letters (with no distinction between upper and lower case), and if a letter can be repeated, then the maximum number of names is 26x26x26x26x26x26x26, or 8,031,810,176. That is, slightly more than eight billion names are possible.</span>
Answer:
<u>Parametric design</u> involves engineers building up a 3D geometry piece by piece. 2D sketches turn into 3D features, with constraints and relations duly applied to fit the designer's intent.
Explanation:
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