Final answer:
Bert can bake 42 cookies with 7 scoops of flour by calculating the unit rate of cookies per scoop of flour which is found to be 6 cookies per scoop.
Step-by-step explanation:
We are asked to find out how many cookies Bert can bake with 7 scoops of flour given that he can bake 18 cookies with 3 scoops of flour. This is a problem that involves setting up a proportion using unit rates. To solve this problem, first, we determine the unit rate of cookies per scoop of flour.
With 3 scoops, Bert bakes 18 cookies. So, the unit rate is:
\(\frac{18 \text{ cookies}}{3 \text{ scoops of flour}} = 6 \text{ cookies per scoop}\)
Now, with this unit rate, we can find out how many cookies can be baked with 7 scoops:
\(7 \text{ scoops} \times 6 \text{ cookies/scoop} = 42 \text{ cookies}\)
Bert can bake 42 cookies with 7 scoops of flour using the unit rate we calculated.