What is the area of the shaded sector

Area of the sector is 558.22ft².

Explanation:

A= N/360(πr²)

where;

N=160°

π=3.14

r=20

A= 160/360(3.14(20)²)

A= 160/360(3.14(400))

A= 160/360(1256)

A=558.22ft.

Recall that area is measured in square units. And the unit of the radius is ft. Therefore our final answer becomes 558.22ft².

Also note that a sector is the part of a circle enclosed by two radii of a circle and their intercepted arc. It iseasily noted to be the pie-shaped part of a circle.

b. Intrusion; Granitic Batholith

Explanation:

Xenoliths are a rocky fragment that becomes developed in large bodies of the rocks and thus as a result of the solidification process, they are described as the inclusions of the igneous rocks when the release of the magma and they thus occur along with the magma chambers. As they are non-uniform and they are also found on the meteoroids and contain two types of gabbro that are formed by different pressure and temperatures. They provide information about the upper mantle.