Does anyone know the answer to this is is very important!!

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?