It is given that the world's tallest tree is 380 feet. This means that the height of any other tree is to shorter than this. Thus, l should be less than 380 ft. l<380 ft Let's convert 380 feet to inches since l is measured in that unit. We should multiply 380 with 12 since 1 foot is 12 inches. 380⋅12=4560 Therefore, l can be described with the following inequality. l<4560