Emily installs artificial grass in her garden. The garden is 15 feet long and 30 feet wide. It takes her 4 hours to install the grass. What is the average speed at which Emily installs the grass? ft2 per hour

First you need to find the area of the garden. The formula for that is A=bh.

the base is 15 and the height is 30. 15 x 30 = 450, making the area of the garden 450 feet.

Next you need to divide the area, 450 by the number of hours it took to install all the grass, which is 4. 450 divided by 4 is 112.5

Emily installed the grass at an average speed of 112.5 feet per hour.