Help with part A anybody

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

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.

If the class creates a histogram of the data in table, how many students are in the range 12cm to 13.9 cm