Alexis needs to paint the four exterior walls of a large rectangular barn. the length of the barn is 80 feet, the width is 50 feet, and the height is 30 feet. the paint costs $28 per gallon, and each gallon covers 420 square feet. how much will it cost alexis to paint the barn? explain your work.

Scenario: susan wants to make 2 square flags to sell at a crafts fair. the fabric she wants to buy is 3 meters wide. she doesn't want any fabric left over. what's the least amount of fabric she should buy? question: which equation will susan solve her problem? note: let x represent the length of 1 side of the flag. options: 1) 2x^2 = 4x 2) 8 +2x = 2(4x) 3) 2 * 2 = 4 * 2 4) 4x^2 -2x = 0