Answer:
I think it is c
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
No because the arcs do not have the same measure. The measure of one arc is 142 and the other is 140.
An angle bisector divides an angle into equal parts.
<em>The value of x is 7</em>
The given parameters are:


Line AE is the angle bisector of 
This means that:

So, we have:

Divide both sides by 2

Subtract 2 from both sides

Divide both sides by 9

Rewrite as:

Hence, the value of x is 7
Read more about angle bisectors at:
brainly.com/question/12896755
Answer:
Volume: 
Ratio: 
Step-by-step explanation:
First of all, we need to find the volume of the hemispherical tank.
The volume of a sphere is given by:

where
r is the radius of the sphere
V is the volume
Here, we have a hemispherical tank: a hemisphere is exactly a sphere cut in a half, so its volume is half that of the sphere:

Now we want to find the ratio between the volume of the hemisphere and its surface area.
The surface area of a sphere is

For a hemisphere, the area of the curved part of the surface is therefore half of this value, so
. Moreover, we have to add the surface of the base, which is
. So the total surface area of the hemispherical tank is

Therefore, the ratio betwen the volume and the surface area of the hemisphere is

Answer: 10
Step-by-step explanation: