Answer:
39 pounds is needed
Step-by-step explanation:
Given
Lawn Dimension: 78' by 93'
4 pounds fertilizer for 750ft² area
Required
Determine the amount needed for the given dimension
First, we need to calculate the area of the lawn

' means feet
So:


Let the amount of fertilizer need be x
So, we have:
4 pounds = 750ft²
and
x = 7254ft²
Cross Multiply:


Solve for x


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<em> (approximated)</em>
Answer: 8 1/2 is less than 9 1/2, 8 1/2< 9 1/2
1) Volume of the box = 90*45*45=<span>182250 cm³
2) filled with soil = 0.85*</span>182250= <span>154912.5 cm³
3) </span>182250 cm³-154912.5 cm³=<span>27337.5 cm³ not filled
4) </span>27337.5 cm³/28316 cm³=0.9654 ≈ 1 bag
The answer to your question is 11.25