Saying "$45 per ticket" is the same as saying "$45 for every single ticket" or "one ticket costs $45"
Similarly, "30 seats for every row" is equivalent to "each row has 30 seats"
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choices B and D aren't unit rates because the second value mentioned isn't 1. You would have to divide to get to a unit rate. choice B: 5/3 = 1.67 so there are roughly 1.67 shows every week choice D: 100/5 = 20 meaning its $20 per ticket