Answer:
The dirt is
deep
Step-by-step explanation:
The raised garden bed has width, w=6ft.
The length of the garden bed is;
l=8ft
The height, h is how deep, the dirt is.
The volume of dirt the garden bed contains is 32 cubic feet.
The volume is given by the formula;
![Volume=l\times w\times h](https://tex.z-dn.net/?f=Volume%3Dl%5Ctimes%20w%5Ctimes%20h)
We substitute the given values and solve for x.
![32=8\times 6\times h](https://tex.z-dn.net/?f=32%3D8%5Ctimes%206%5Ctimes%20h)
![32=48h](https://tex.z-dn.net/?f=32%3D48h)
![h=\frac{32}{48}](https://tex.z-dn.net/?f=h%3D%5Cfrac%7B32%7D%7B48%7D)
![h=\frac{2}{3}ft](https://tex.z-dn.net/?f=h%3D%5Cfrac%7B2%7D%7B3%7Dft)
The dirt is
deep
She can ride 12 miles in 90 minutes