The Millers have hired an interior designer to decorate their family room. They want to have a 20" by 20" oil painting framed and incorporated in the design plan. If the designer chooses molding that is 4" wide and is priced at $2.10 per inch, how much will the molding cost (before tax)?

L = 4 + 20 + 4 = 28 in.

W = 4 + 20 + 4 = 28 in.

P = 2L + 2W = 2*28 + 2*28 = 112 1n.

Cost = 112in * 2.10/in. =

well, the perimeter of the painting is 20x20 inches

But the molding is 4" wide, so the outside length of the molding is 28x28.
So the cost is 4*28 inches * $2.10/inch = $___________

To calculate the cost of the molding, we need to determine the perimeter of the painting since the molding will be placed around the edges.

The perimeter can be calculated by adding up the lengths of all four sides. Since the painting is a square and each side measures 20 inches, the perimeter would be:

Perimeter = 20 inches + 20 inches + 20 inches + 20 inches = 80 inches

Now, we need to calculate the cost of the molding per inch by multiplying the price per inch ($2.10) by the width of the molding (4 inches):

Cost per inch = $2.10/inch × 4 inches = $8.40/inch

Finally, we can calculate the total cost of the molding by multiplying the cost per inch by the perimeter of the painting:

Total cost of molding = $8.40/inch × 80 inches = $<<8.4*80=672>>672

Therefore, the molding will cost $672 (before tax).

To calculate the cost of the molding, we need to determine the perimeter of the oil painting, as the molding will go around all four sides.

The dimensions given for the oil painting are 20" by 20", so the perimeter can be calculated by adding up all four sides: (20 + 20 + 20 + 20) inches.

Adding these values together, we get 80 inches as the total perimeter of the oil painting.

Next, we need to calculate the total cost of the molding. The molding is priced at $2.10 per inch, so we need to multiply the total perimeter (80 inches) by the cost per inch ($2.10):

80 inches * $2.10/inch = $168.

Therefore, the cost of the molding, before tax, is $168.