We have to calculate the area of each rectangle using the formula:
[tex]A=b\times h[/tex]
where A is the area, b the base, and h the height.
• Jamal's garden: b = 5 and h = 4
[tex]A=5\times4=20[/tex]
• Emily's garden: b = 4 and h = 7
[tex]A=4\times7=28[/tex]
• Kylie's garden: b = 4 and h = 5
[tex]A=4\times5=20[/tex]
Finally, we add all the areas to get the area of all gardens :
[tex]A_T=20+28+20=68[/tex]
Answer: 68ft²
