X=3 is a factor of x^3+3x^2-7x+19.
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Since the bottom shape is a semi-circle, the 3yd is the radius making the triangle's area 7 x 3 / 2 = 10.5
The semi-circle's area is
/2 = 14.14
Combined, you get an area of 10.5 + 14.14 = 24.64
The semi-circle's area is
Combined, you get an area of 10.5 + 14.14 = 24.64