A box has the shape of a rectangular prism with height 30 cm. If the height is increased by 0.4 ​cm, by how much does the surface area of the box​ increase?

Talia grouped the terms and factored out the gcf of the groups of the polynomial 15x2 – 3x – 20x + 4. her work is shown below. (15x2 – 3x) + (–20x + 4) 3x(5x – 1) + 4(–5x + 1) talia noticed that she does not have a common factor. what should she do?