As diagonals are not perpendicular, it cannot be a square or rhombus (latter does not have congruent diagonals). Hence, quadrilateral is a rectangle.
We need to first find the area of all the dozen planks, top and bottom.
A=(length)(width)
A=(8)(3)=24 feet squared
24+24=48 feet squared for each plank
Then, you would multiply 48 with 12 since all the planks have the same dimensions.
(48)(12)=576 feet squared in total
Then in order to find the number of pints of varnish needed to cover the dozen planks top and bottom, we need to divide the total area, 576 with 125 which is about 4.608 which means that Alex needs 5 pints of varnish to cover all the planks.
Answer: 4 pints of varnish
If the question is just an expression you need to use the distributive property to get rid of the parenthesis. The distributive property is used to multiply a number to terms within parenthesis.
In reality
So the answer is