Math, geometry
posted by Serena Fan .
The perimeter of a rectangular red sticker is 30 millimeters. The sticker is 4 millimeters tall. How wide is it?

perimeter of a rectangle = 2width + 2length
30= 2w+2(4)
30= 2w+8
22= 2w
w= 11 millimeters 
537

The área of a rectangular piece of plástico is 20 suare millimeters .the piece of plástico is 2 millimeters tall.how wide is it
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