Hope it helps with your work
You can divide 20 by 4 to find the answer to how much she cut off, which is 5cm. What's left is 15cm.
Formula- A = π r²
a= area
r= radius
diameter of the circle- 3.75 x 2 = 7.5
hope this helps :)
Answer:
The question is asking which combinations of 
make different types of equations. y=2x^2 makes a quadratic equation, y=-4x+1 makes a linear equation, and y=1 makes a horizontal line
