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Question 71912This question is from textbook
: Can u help with variation?
A concrete supplier sells premixed concrete in 300-ft^3 truckloads. The area (A) that the concrete will cover is inversely proportional to the depth (d) of the concrete.
a. Write a model for the relationship between the area and the depth of a truckload of poured concrete.
b. What area will the concrete cover if it is poured to a depth of .5 feet? A depth of 1 ft? A depth of 1.5 ft?
c. When the concrete is poured into a circular area, the depth of the concrete is inversely proportional to the square of the radius (r). Write a model for this relationship.
Thank you so much!!!
This question is from textbook
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A concrete supplier sells premixed concrete in 300-ft^3 truckloads. The area (A) that the concrete will cover is inversely proportional to the depth (d) of the concrete.
a. Write a model for the relationship between the area and the depth of a truckload of poured concrete.
A = k/d is the equation you want
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b. What area will the concrete cover if it is poured to a depth of .5 feet? A depth of 1 ft? A depth of 1.5 ft?
A = k/0.5
A = k/1
A = k/1.5
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c. When the concrete is poured into a circular area, the depth of the concrete is inversely proportional to the square of the radius (r). Write a model for this relationship.
A = k/r^2 is the equation you want.
Cheers,
Stan H.
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