Answer:
223.07
Explanation:
Hey There!
So the first step of this problem is to find the equation for the area of a parallelogram and the area of a circle 
The area of a parallelogram is equal to bh 

the base is 20 and the height is 15
20x15=300
Now we want to find the equation for area of a circle 
to find the area of the circle we use the formula 

A = π x radius²
the radius is the diameter divide by 2 
14/2=7 so the radius is 7 
now we just plug 7 into the area of a circle formula
7²=49
49x3.14=153.86
But because it is a semi circle we divide by 2 
153.86/2=76.93
Now to find the area of the object we subtract 76.93 from 300
300-76.93=223.07 
Therefore the area of that object is 223.07
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