Zero helps mark directions in value. Choose ALL contexts that correctly describe zero. A) elevation: 0 feet is called the ground floor
B) bank account: below $0 is a negative balance
C) electricity: an object that has 0 charge is neutral
D) buildings: on an elevator, 0 represents the sea level
E) temperature: temperature above 0° is a negative temperature

Step-by-step explanation:

The area formula of a circle is:

A=pi*r^2

a semicircle is half the area of a circle:

A=0.5*pi*r^2

now lets find that area:

A=0.5*pi*r^2

A=0.5*pi*8^2

A=0.5*pi*64

A=32pi mm^2

A= around 32*3.14

A= around 100.48 mm^2

Now, lets find the area of the triangle:

it is half the product of the diameter and radius:

A=0.5*8*(8+8)

A=4*16

A=64 mm^2

Now lets find the approximate area of the shaded region:

Asc-At=Ashaded

Ashaded=100.48-64

Ashaded=36.48 mm^2