Answer:
0.055
Step-by-step explanation:
file is attached with explanation
13 dollars per gallon
130\10 = 13
She had 22 boxes to start
The answer would be 13.9 kg of gravel used per square meter

Actually Welcome to the Concept of the Surface Areas and Volumes.
Since, Volume of cone = 1/3 π r^2 h,
here, r = 10 Inches and h= 12 inches, also π =3.14
so, VOC = 1/3 π (10)^2 × (20)
VOC = 1/3(3.14)(100)(20)= 2093.33 inch^3
=> so the volume of the cone is 2093.33 cubic inches.