Zero is a) always b) sometimes c) never a divisor?

Never a divisor because you can never divide by zero

Anwers C

Never divide by zero. Performing such actions causes the calculation loses its meaning , often hidden error . For trivia I give the college applies the provisions in which 0 is in the denominator as a symbol eg in mathematical analysis , complex numbers .

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The answer is 225 miles per 4.5 hours. hope this ; )