Which problem solving strategy would be best to solve this problem? Jim and Lillian are painting a wall that is 15 ft wide and 9 feet tall. How much paint will they need to buy?
A. work backwards
B. use a formula
C. make a table, chart or list
D. make a model or diagram

The correct option is;

B. Use a formula

Step-by-step explanation:

Given that Jim and Lillian have the dimensions of the wall they want to paint, therefore, in order to know how much paint they need to buy, they should proceed as follows;

1) Determine the quantity of paint required to paint a unit area of the wall, and record the quantity UA

2) Calculate the area, A, of the wall they want to paint, which is 15 ft. × 9 ft. = 135 ft.²

3) The amount of paint needed, AmP is therefore given by the following formula

AmP = A × AU = 135 × AU