Answer:
10
Step-by-step explanation:
The area of the rectangle is 100cm, so if the area of the square is the same as the rectangle, then the side of the square would be 10. 10 x 10 is 100.
(I'm sorry if my explanation sucks)
the focus and directrix will both be shifted down 3 units
_5(_5)=25
25+2=27
3(_5)=_15
27_15=12
