Answer:
7 Artichokes
Explanation:
To figure this out, we need to find out how much Vitamin C an average adult needs. We set up a proportion.
![(9)/(15) = (x)/(100)](https://img.qammunity.org/2022/formulas/mathematics/college/fce6o1bvf4zani7xbr3888df9nsjln89rh.png)
![15x=900](https://img.qammunity.org/2022/formulas/mathematics/college/xrb82robxiuf0s5as4p0lzynqqsqjnkgtd.png)
![x=60](https://img.qammunity.org/2022/formulas/mathematics/college/v3moyx23un7ax7rqo9a11lcr8xbpax5zzo.png)
Now, since each artichoke is worth 9 milligrams, we divide 60 by 9.
![60/9=6.66666...](https://img.qammunity.org/2022/formulas/mathematics/college/djnnxbfbg8m4fsg5j5450h73gjo88i7ij1.png)
So, to get the necessary amount of Vitamin C, we round up to 7.