1)
What is "Egel Marbek"?
1.
Rashi, Targum Yonasan: It is a fattened calf. Radak - the place where they fatten it is called Marbek, like Hichnisah l'Ravkah v'Dashah (Pesachim 26a). 1
1
So R. Chananel explained there, i.e. to graze (Maharam Chalavah). Rashi explained that cattle are yoked there. (PF)
2)
Why is the Aleph omitted from "va'Tofehu"?
1.
Radak: She hastened to bake them and did not wait for them to become Chametz, to feed him quickly, for she saw that he was very befuddled.