Aparabola has a vertex at the origin. the equation of the directrix of the parabola is y = 3.
what are the coordinates of its focus?
(0,3)
(3,0)
(0,–3)
(–3,0)
urgent. need quick.

The correct option is 3.

Step-by-step explanation:

The vertex of parabola is origin and directrix of the parabola is y = 3.

The standard form of a parabola is

Where (h,k) is vertex. (h,k+p) is focus and y=k-p is directix.

The vertex of parabola is origin. So,

Directrix of the parabola is y = 3.

The value of p is -3.

Focus of the parabola is (h,k+p).

Therefore focus of the parabola is (0,-3) and option 3 is correct.

hi there, the correct answer would be c! or (0,-3) hope this helps :)

Step-by-step explanation: i just took the test and got all of em correct

a.) list the factors of 40.

1/2/4/5/8/10/20/40

b.) list the factors of 40 that represent the number of cans that could be on each shelf.

5

c.) how many different arrangements of cans are possible?

just one because if you put more on one shelf you will go way over 40 and the cabinet will probably break.

d.) what are the possible arrangements of the cans?

put 5 cans on each self to reach 40 cans in total.

e.) which arrangement uses all the shelves?

5 because you can put 5 cans on each shelf, and since there are 8 shelfs you are equally going to get 40 cans.