Sarah is designing a triangular pyramid made of all glass to go on top of a building. All of the faces of the pyramid have a height of 17 feet and a base of 20 feet. Note: Figure is not drawn to scale.

How much glass is needed?
A.
340 sq ft
B.
680 sq ft
C.
2,040 sq ft
D.
1,360 sq ft

Probability is the measurement of the likelihood that an event or instance will happen or occur. an event is an outcome or a collection of outcomes. in this case, the events that have at least one outcome in common are overlapping events. to solve for overlapping events, we use the formula: p(a) + p(b) - p(a and b)