If the entire circle graph represents earths atmosphere which component is represented by the shaded area of the graph

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

Equilateral triangle pbj is inscribed in a circle as shown. determine the measure of arc pjb.

The ratio of the measures of the three angles in a triangle is 14: 15: 11 find the measures of the angles