The environmental protection agency is attempting to revive 3 acres of contaminated soil by replacing the top 24 inches of the soil. trucks with a hauling capacity of 28 cubic yards of soil are hired to remove the contaminated soil. how many full truckloads of contaminated soil will be hauled away?

346 trucks are needed

Step-by-step explanation:

We know that one acre equals 43560 feet ^ 2

In this case the area is 3 acres. So:

We know that 1 foot equals 12 inches. So:

So the volume of the contaminated area is:

In a cubic yard there are 27 cubic feet. So:

Finally if we have a volume of and each truck can transport then the amount of trucks x we need is:

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.