A window manufacturing company sells windows that are in the shape a half circle (semi-circle), with the length of the base of the window, b, forming the diameter of the circle.
a. Make a drawing of the window and label b on your drawing.
b. Write an expression to represent the perimeter or length of the frame of the window (in inches) in terms of the length of the base of the
window, b.

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c. Write a formula to define the length of the frame (perimeter), P, of the window (in inches) in terms of the length of the base of the
window, b.
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d. Evaluate the formula when b = 19.
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