Question

Please help me with this question. (100 points)

Answer 1

Answer:

8 pounds

Step-by-step explanation:

• Ratio of C:N = 30:1
• C - carbon content, N - nitrogen content

Given

• Coffee grounds = 1 pound contains 25% C and 1% N
• Rotten vegetables = 6 pounds  contains 10% C and 1% N
• Dry leaves = ?  pound  contains  30% C and 0.5% N

Solution

Coffee grounds and Rotten vegetables together give:

• 1 + 6 = 7 pounds
• C = 1*0.25 + 6*0.1 = 0.25 + 0.6 = 0.85
• N = 1*0.01 + 6*0.01 = 0.01 + 0.06 = 0.07

Add dry leaves of x pounds:

• Total = 7 + x
• C = 0.85 + 0.3x
• N = 0.07 + 0.05x

Finding required weight of dry leaves:

• (0.85 + 0.3x)/(0.07+0.005x) = 30/1
• 0.85 + 0.3x = 30(0.07 + 0.005x)
• 0.85 + 0.3x = 2.1 + 0.15x
• 0.3x - 0.15x = 2.1 - 0.85
• 0.15x = 1. 25
• x = 1.25/0.15
• x = 8.33 pounds = 8 pounds rounded to nearest pound

Answer 2

Answer:

6 pounds

Step-by-step explanation:

hope it helps!!