Can someone fill in the blank for the definition of a semi-circle: The joining two endpoints of the diameter. It is the arc of exactly 1/2 the circle.

Fabian harvests 10 pounds of tomatoes from his garden. he needs 225 pounds to make a batch of soup. if he sets aside 2.8 pounds of tomatoes to make spaghetti sauce, how many batches of soup can fabian make?

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Ineed i been stuck on this question since yesterday