Why is “3 meals a day" a unit rate?

Answers:

It compares 1 meal to 1 day.
It compares 1 meal to 3 days.
It compares 3 meals to 1 day.
It compares 3 meals to 3 days.
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Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

What is the equation of the graph below? y=sec(x)-4

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]