The number of calories that she will consume if she eats 5 cookies is; 400 calories
We are told that;
The number of calories consumed at snack varies directly with the number of cookies eaten
Thus;
a = kb
where;
a = number of calories consumed at snack.
b = number of cookies eaten
Thus, at b = 3 and a = 240, we have;
240 = 3k
k = 240/3
k = 80
Thus, calories for 5 cookies is;
a = 80 * 5
a = 400 calories
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