Exact Answer: 12pi
Approximate Answer: 37.68
The approximate answer is when you use the approximation pi = 3.14
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Step-by-step explanation:
The area of the full circle is
A = pi*r^2
A = pi*4^2
A = 16pi
Take 3/4 of this to get the area of the "pacman" like shape that is shown
(3/4)*16pi = (3/4*16)pi = 12pi
12pi = 12*3.14 = 37.68 approximately