To find out how many cookies Arianna can bake with 7 scoops of flour using the unit rate, we first determine the number of cookies baked per scoop of flour.
From the information given:
- 3 scoops of flour → 15 cookies
Now, let's calculate the unit rate in terms of cookies per scoop of flour:
\[ \text{Cookies per scoop} = \frac{15 \text{ cookies}}{3 \text{ scoops}} = 5 \text{ cookies per scoop} \]
Next, we can use this unit rate to calculate how many cookies Arianna can bake with 7 scoops of flour.
\[ \text{Cookies with 7 scoops} = 5 \text{ cookies/scoop} \times 7 \text{ scoops} = 35 \text{ cookies} \]
Thus, with 7 scoops of flour, Arianna can bake 35 cookies.
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