The width of a rectangle is fixed at 4cm. For what lengths will the area be less than 86 cm^2

The width of a rectangle is fixed at 4cm. For what lengths will the area be less than 86 cm^2

The Area (A) of a rectangle is given by:
A = lw

With an area of less than 86 and a width of 4, we have the following inequality:
4l < 86

To solve for l, we type this inequality into our search engine and we get:
l < 21.5