Question

according to Interstate Highway Standards, U.S. and state highway traffic lanes must be at least 12 feet wide. Write an inequality to represent the widths that traffic lanes can be.

Answer 1

So,

"at least" means that is the minimum acceptable amount.  So we will use the "greater than or equal to" symbol.

Let "w" represent the width of the traffic lane.

w ≥ 12 ft.