An ice cream stand uses the expression 2 + 0.5x to determine the cost (in dollars) of an ice cream cone that has x scoops of ice
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To find the area of a sector of a circle use the next formula:
As the given circle has a outside angle 90º (it is not part of the sector of the circle) subtract the 90º from 360º (total angle of a circle) to find the angle of the sector:
Find the area of the sector with angle 270º: