The coordinates of the focus of the parabola −0.25x2 = y − 2 are:
a. (0, 6) b. (0, 1)c. (0, −2)d. (0, 3 )

Option B is right.

Step-by-step explanation:

given is an equation of a parabola

Vertex is (0,2)

It is open down.

Axis of symmetry is x=0 or y axis

Hence focus will lie on axis of symmetry ie y axis.  

THe parabola has -4a = -4

Hence a = 1

SO focus will lie inside the parabola on axis of symmetry with a distance of a units from the vertex.

i.e. focus would equal = (0,2-1) = (0,1)

Option B is right

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour