Answer:
75.44 Square Inches
Step-by-step explanation:
The diagram of the problem is produced and attached.
To determine the area of the cleaned sector:
Let the radius of the larger sector be R
Let the radius of the smaller sector be r
Area of the larger sector 
Area of the smaller sector 
Area of shaded part =Area of the larger sector-Area of the smaller sector

From the diagram, R=10 Inch, r=10-7=3 Inch, 
Therefore, Area of the sector cleaned

Answer:
22 units
Step-by-step explanation:
Add 12, 4 , and 6 and you will get 22
First you’ll multiply to get 3x2x2 + 4x3. Then add them together. 12+12=24
Old. new
100%. 45%
x. 42
45x= 4200
x=$93.33