Joe would like to paint a rectangular shaped wall. The measures of dimensions of the wall are 8 inches by 4 inches. Every 1 inch represents 3 feet of the actual wall. If the cost of the painting is $2.50 per square feet, find the total cost of paint needed for the entire wall. (pls help)

Scale factor : 1 in = 3 feet

Step 1 :

Find the length of the wall in feet.  

Length  =  8 inches

Length  =  8 x 3 feet

Length  =  24 feet

Step 2 :

Find the width of the wall in feet.  

Width  =  4 inches

Width  =  4 x 3 feet

Width  =  12 feet

Step 3 :  

Find area of the wall in square feet.  

Area of the wall  =  Length x Width  

Area of the wall  =  24 x 12

Area of the wall  =  288 square feet.  

Step 4 :  

Find the total cost of painting for the entire wall.  

Cost of painting per square feet  =  $2.50

Total cost of painting for the entire wall  is equal to area of the wall times $2.50

=  288 x 2.50

=  720

So, the total cost of painting for the entire wall is $720

Step-by-step explanation: