The farmer needs to buy fertilizer to spread on his garden. The garden is a 20 x 15 rectangle. A bag of fertilizer covers 30 ft.² of garden. How many bags of fertilizer will be needed?

Step-by-step explanation:

The area of a rectangle is given by , where is the length of the rectangle and is the width of the rectangle. Therefore, the area of a 20 x 15 rectangle is equal to .

Since one bag of fertilizer covers 30 square feet, the farmer needs bags of fertilizer.

both equations and proportions are better.