Step-by-step explanation:
Since we have given that
Material needed to make a pillow cover is given by
We need to calculate the material which will be needed to make 9 pillows covers.
So, we use the "Multiplication Operation" as we need the value for more pillow covers :
Polygons, Number of sides, Measure is angles, and angle sums
Explanation is in the file
tinyurl.com/wpazsebu
11/20
Divide 11 by 20 to find the decimal value.
11/20 = 0.55
The decimal only contains two numbers, so it is a terminating fraction.