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Aleks04 [339]
2 years ago
15

A farmer uses two types of fertilizers. A 50-lb bag of Fertilizer A contains 10 lbs. of nitrogen, 2 lbs. of phosphorus, and 6 lb

s. of potassium. A 50-lb bag of Fertilizer B contains 5 lbs. each of nitrogen, phosphorus, and potassium. The minimum requirements for a field are 420 lbs. of nitrogen, 240 lbs. of phosphorus, and 360 lbs. of potassium. If a 50-lb bag of Fertilizer A costs $35 and a 50-lb bag of Fertilizer B costs $25, find the amount of each type of fertilizer the farmer should use to minimize his cost while still meeting the minimum requirements. What is the cost
Business
1 answer:
Lera25 [3.4K]2 years ago
3 0

The answer is, Fertilizer A = 20, Fertilizer B = 56.

<h3>What is fertilizer and example?</h3>
  • Among the organic fertilizers that occur naturally are manure, slurry, worm castings, peat, seaweed, and guano. Crops made of green manure are also raised to enrich the soil with nutrients.
  • Organic fertilizers also include naturally occurring minerals including mine rock phosphate, sulfate of potash, and limestone.

<h3>Set up the equations:</h3>
  • Nitrogen: 8x + 5y ≥ 440.
  • Phosphorous: 2x + 5y ≥ 260.
  • Potassium: 4x + 5y ≥ 360.
<h3>Find the vertices:</h3>
  • It is easiest to graph the equations to find the vertices. (see attachment).
  • You can also solve each system of equations to find the intersected points.

<h3>The following satisfy the "greater than or equal to" requirement:</h3>
  • (0, 88)  = y-intercept of Nitrogen equation.
  • (20, 56) = intersection of Nitrogen and Potassium equations.
  • (50, 32)  = intersection of Phosphorous and Potassium.
  • (130, 0)  = x-intercept of Potassium.

<h3>Use vertices in cost function C(x) to find the minimum:</h3>

  • C(x) = $30x + $20y.
  • (0, 88): $30(0) + $20(88) = $1760.
  • (20, 56): $30(20) + $20(56) = $1720    = This is the minimum!
  • (50, 32): $30(50) + $20(32) = $2140.
  • (130, 0): $30(130) + $20(0) = $3900.

The minimum cost occurs when 20 bags of Fertilizer A and 56 bags of Fertilizer B are purchased.  

Learn more about Fertilizer here:

brainly.com/question/3204813

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