1 acre = 43,560 square feet
6 inches = 1/2 foot
Volume of topsoil = (43,560 square feet) times (1/2 foot) = 21,780 cubic feet
1 cubic yard = 27 cubic feet
(21,870 cubic feet) / (27 cubic feet per cubic yard) = 806 and 2/3 cubic yards
You can not buy an annuity value calculator. It is a tool used in the financial industry to figure out future values or fixed payments. You can use a scientific calculator to figure this out. Just key in the correct formula and you will have your answer.
You already "figured" it out. (That is the correct spelling.)
The weight of a yard (a cubic yard, more accurately) of topsoil varies greatly depending upon its moisture content and how well packed it is. But figure 2000 to 2400 pounds.
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I honestly have no clue what the formula is so if i don't someone needs to figure it out!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Each chemical element has a standardized chemical symbol, not a formula.
our apprehension of the figure as got more exacting in definition, the figure as not changed but our understanding of it does, be it the correct or incorrect.
Use the formula for the particular figure
You get the area by using formulas. There is usually a specific formula to find the area of each shape. Some irregular shaps may not have a formula.