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Identifiers in Python should use which style?

Which statement reads a user-entered string into variable user_name?

Roger currently runs a restaurant on a busy street filled with many other restaurants. The local health inspector, however, has plans to shut down many of these restaurants. What impact will the closure of restaurants have?

  Basic instruction types are input, processing, and _____.  

When the government places a tax on the producer of a good or service

Using the definition of divides, prove the following statement or provide a counterexample to disprove: “For all a, b, c ∈ ℤ with a ≠ 0, if a|b and a|c then a|(b + c).”  Use good proof technique.  Note:  To avoid the need to type special symbols, use ‘does not equal’ for ≠. Grading rubric: 1 pt. State the definition of divides at the beginning. 1 pt. State any givens and assumptions.  1 pt. Clearly explain your steps and reasoning. 1 pt. State the final conclusion at the end of the proof.

Source code, like Python .py files, can be edited with Notepad.

The decimal expansion of the hexadecimal number A916 is _______________ten. Only type the digits; do not include the base.

What is the least integer n such that the function 2×4 + 5×3 + 10x + 3 is O(xn)?

Prove, or provide a counterexample to disprove, the following statement:             “The function f : ℕ ⟶ ℕ  be defined by f(n) = n(mod 5) is onto.” Use good proof technique. Grading rubric:1 pt. State the definition of onto at the beginning, then prove or disprove.1 pt. State any givens and assumptions.1 pt. Clearly explain your reasoning.1 pt. Remember to state the final conclusion at the end of the proof.