So you want to know how much rolls can Rosa make with the dough, here's the answer:
First we notice that each roll takes 1/8 of dough, and then we make [tex]3 \frac{3}{4} [/tex] into [tex] \frac{30}{8} [/tex].
Then we find, that we can make 30 rolls with the dough Rosa has!
Hope this helped! c: