Iconic memory lasts for while echoic memory lasts for 10 seconds; 1 second 1 second; 10 seconds 5 seconds, 20 seconds 20 seconds, 5 seconds

Maryann’s friends loved her bulletin board, and 4 of them asked her to make one for their homes. she offered to make each of her friends a replica of her bulletin board that measures 2 meters by 3 meters. how many kilograms of burlap should maryann collect to complete the bulletin boards for her friends? maryann should collect kg of burlap.