Answer: (a) and (d)
Step-by-step explanation:
From the graph, vertex is at
Graph is same about the point
. Therefore, axis of symmetry is the line 
Y intercept is the place where curve intersect the Y-axis that is 
Option (a) and (d) are correct.
Answer:
2
Step-by-step explanation:
thx
Answer:
The volume increases at a rate of 
Step-by-step explanation:
The rate of change of the radius with respect to time is 4 mm / s.
So:

Now we must find a relationship between the volume of a sphere and its radius.
The equation of the volume of a sphere is:

So:

The diameter of the sphere is 100 mm. Therefore its radius is 100/2 = 50 mm.
So:

The volume increases at a rate of :
40000 π mm ^ 3 / s = 125663.71 mm^3/s
Answer:
21:14:8
Step-by-step explanation:
X:Y=3:2
Y:Z=7:4
X:Y=21:14
Y:Z=14:8
X:Y:Z=21:14:8